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Back to Table of Contents
Overview
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Gateway (WRTC) is a new technology that enables web browsers to participate in audio, video, and data communications, without any kind of additional plug-ins or application downloads. Using a WRTC enabled browser user can place a call, participate in multi-party video and audio conferencing, and engage in screen sharing collaboration.
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The
Web Service Solution bridges the web and SIP worlds to facilitate the integration of communications (voice, video, and data) in applications....
The
SBC is a component of ...
the
Web Service Solution. ...
The SBC provides media service functionality when WRTC endpoints are behind a NAT.
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The SBC acts as a WRTC to SIP media gateway. It enables WRTC users to communicate to any back-end SIP system and PSTN.
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The SBC also provides routing, security, transcoding, and interworking. It supports the following functionalities:
Relays and monitors the media streams.
Inter-works WRTC media DTLS/SRTP to traditional RTP/UDP.
Relays or transcodes opus to G7xx voice codecs.
Relays VP8/VP9, and H.264 video codecs.
Supports ICE and STUN procedures for NAT traversal.
Deployment Scenarios
WRTC Enabled Device to SIP Call (SBC in Data Center)
The WRTC enabled device employs the ICE procedures and connects to the SBC on a public address. The SBC acts as an ICE agent to support the WRTC enabled device to punch the pinholes in the NAT for media exchange with the SBC. This can work with any Firewall in front of the WRTC enabled device that can support opening NAT Pinholes for the UDP traffic. The NAT can be Full-Cone, restricted, or symmetric NAT.
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| 0 | Figure |
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| 1 | Browser to SIP call |
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 Image Modified
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WRTC Enabled Device to SBC Through TURN Server
In this case, media is exchanged between the WRTC enabled device and the SBC. The ICE mechanism is used to negotiate a relay address for the firewalls in front of the WRTC enabled device to use for media exchange over TCP or http ports. A TURN relay is used with media path to convert RTP/TCP to RTP/UDP towards SBC.
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| 0 | Figure |
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| 1 | Browser to SBC through TURN server |
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Call Flows
Basic call (
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| 0 | Figure |
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| 1 | Basic Call between UE supporting ICE and no ICE |
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- M11 - RTP Sever Reflexive candidate
- M12 - RTP Host candidate
- M11C - RTCP Sever Reflexive candidate
- M12C - RTCP Host candidate
Mid Call ICE Restart
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| 0 | Figure |
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| 1 | Mid call ICE restart |
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Configuring WRTC includes:
| Anchor |
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| Configuring ICE-Lite |
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| Configuring ICE-Lite |
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Configuring ICE| Info |
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When natTraversal is set for iceSupport, it is recommended that both mediaNat or secureMediaNatPrefix are not configured. |
To configure ICE for a WRTC call:
| Anchor |
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| SIP Trunk Group Configuration |
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| SIP Trunk Group Configuration |
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SIP Trunk Group ConfigurationThe ICE capability is enabled on the trunk group towards the WRTC endpoints:
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set addressContext default zone ZONE_ |
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WRTC sipTrunkGroup TG_SIPART_ |
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| Note |
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To configure the SDP method, ICE support must be enabled first. |
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WRTC services natTraversal iceSupport iceFull
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| Note |
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- SBC uses
iceFull to support faster completion on the ICE exchange as the two end points locks down on the first accessible connection path attempted. - SBC uses
iceWebrtc to allow selection of the optimum connection path, for example, Host vs TURN address.
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| Configuring Relay SDP Parameters |
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| Configuring Relay SDP Parameters |
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Configuring Relay SDP Parameters| Note |
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The sdpAttributesSelectiveRelay control must be enabled to support WSX-SBC-WSX call scenarios. |
set addressContext default zone ZONE_ |
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WRTC sipTrunkGroup TG_SIPART_ |
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sdpAttributesSelectiveRelay |
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| SDP Method for Multiple IP Version |
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| SDP Method for Multiple IP Version |
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SDP Method for Multiple IP Version| Note |
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To configure the SDP method, ICE support must be enabled first. |
| Code Block |
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set addressContext default zone ZONE_WRTC sipTrunkGroup TG_SIPART_WRTC media mediaAddrType iPv4andiPv6 ice <offerPreference | answerPreference>
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set addressContext default zone ZONE_ |
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WRTC sipTrunkGroup TG_SIPART_ |
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WRTC media mediaAddrType iPv4andiPv6 ice offerPreference <ipv4 | ipv6 | matchSigAddrType>
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set addressContext default zone ZONE_ |
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WRTC sipTrunkGroup TG_SIPART_ |
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WRTC media mediaAddrType iPv4andiPv6 ice answerPreference <honorRecvPrec | ipv4 | ipv6 | matchSigAddrType> |
For detailed information on iPv4 and iPv6 CLI changes, refer to
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SIP Trunk Group - Media - CLI.
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| Policing Logic for STUN Packets |
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| Policing Logic for STUN Packets |
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Policing Logic for STUN PacketsWhen policing is enabled, SBC uses the following prefix lengths to screen the packets that are received from the network. IP addresses that match are allowed to be processed at a higher frequency than IP addresses that do not match.
- RTP IPV6 Host Address - Hard-coded 128 bit prefix
- RTP IPV4 TURN Address - Hard-coded 32 bit prefix
- RTP IPV6 TURN address - Hard-coded 128 bit prefix
- RTP IPV4 Server Reflexive address - Prefix based on the provisioned length
If policing is disabled, all the packets are treated at the lower frequency of processing and can be dropped if there is an excessive amount of traffic received.
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set addressContext default zone ZONE_ |
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WRTC sipTrunkGroup TG_SIPART_ |
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WRTC services natTraversal iceSourceAddressFilterPriority <serverReflexivePrefixLength | state>
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set addressContext default zone ZONE_ |
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WRTC sipTrunkGroup TG_SIPART_ |
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WRTC services natTraversal iceSourceAddressFilterPriority serverReflexivePrefixLength <0..32>
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set addressContext default zone ZONE_ |
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WRTC sipTrunkGroup TG_SIPART_ |
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WRTC services natTraversal iceSourceAddressFilterPriority state <enabled | disabled> |
The aggregate policer screen shows information about the number of STUN packet accepts and discards that have occurred for a given address context. The command for aggregate policer is :
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show table addressContext default ipAccessControlList getAggrPolicers
POL POLICING ZONE POLICING PACKET PACKET AGG POL
ID TYPE ID MODE BUCKET SIZE CREDIT RATE ACCEPT DISCARD NAME
-----------------------------------------------------------------------------------------
0 Link - DataRate 300000 byte 62500000 byte/s 0 0 LINK_pkt0
1 Link - DataRate 300000 byte 62500000 byte/s 0 0 LINK_pkt1
4 StunDtls - PktRate 100 pkt 10000 pkt/s 0 0 STUN
5 StunDtls - PktRate 100 pkt 10000 pkt/s 0 0 DTLS |
| Anchor |
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| Configuring DTLS-SRTP |
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| Configuring DTLS-SRTP |
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Configuring DTLS-SRTP...
| Anchor |
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| Using the Default DTLS Profile |
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| Using the Default DTLS Profile |
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Using the Default DTLS ProfileThe default DTLS profile is already present when the system is up and can be used to run WRTC calls.
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show profiles security dtlsProfile defaultDtlsProfile
handshakeTimer |
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60;
sessionResumpTimer 300;
cipherSuite1 rsa-with-aes-128-cbc-sha;
dtlsRole server;
hashType sha1;
CertName defaultDtlsSBCCert;
cookieExchange enabled;
v1_0 enabled;
v1_1 disabled;
v1_2 disabled;
[ok]
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| Note |
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- In this example, the call setup time to establish a SIP call from a mobile phone may be longer, so the DTLS
handshakeTimer is set to 60 seconds. - For special configuration requirement in the DTLS profile, the default DTLS profile can be modified or a a new DTLS profile can be created. For details, refer to the section Creating the DTLS Profile.
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Creating the Default DTLS ...
| Code Block |
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% set profiles security dtlsProfile d1 CertName defaultDtlsSBCCert cipherSuite1 rsa-with-aes-128-cbc-sha cipherSuite2 nosuite cipherSuite3 nosuite cookieExchange enabled dtlsRole server handshakeTimer 5 hashType sha1 sessionResumpTimer 300 v1_0 enabled v1_1 disabled v1_2 disabled
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| Code Block |
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% set addressContext default zone ZONE_IAD sipTrunkGroup TG_SIPART_IAD media dtlsProfileName d1 |
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% set profiles security cryptoSuiteProfile cp1 entry 1 cryptoSuite AES-CM-128-HMAC-SHA1-80 |
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% set profiles media packetServiceProfile PSP_IAD dtls dtlsCryptoSuiteProfile cp1 |
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| Code Block |
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% set profiles media packetServiceProfile PSP_IAD dtls dtlsCryptoSuiteProfile cp1 dtlsFlags allowDtlsFallback enable enableDtlsSrtp enable |
| Note |
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The allowDtlsFallback parameter enables a fall back to standard RTP when corresponding leg does not have DTLS-SRTP support. If this parameter is disabled, SBC does not allow any other call other than DTLS-SRTP on that leg. |
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Certificate
In case of an upgrade, if the certificate defaultDtlsSBCCert is not present by default, it must be created and enabled before adding it to the DTLS profile.
To check the availability of the certificate defaultDtlsSBCCert, enter the following command:
| Code Block |
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show configuration system security pki certificate
certificate defaultSBCCert {
state enabled;
fileName sonuscert.p12;
passPhrase $7$D9bBhC0fE+n89v5kimypN4dl1KCGAwRj;
type local;
}
certificate defaultDtlsSBCCert {
state enabled;
fileName defaultDtlsCert.p12;
passPhrase $7$D9bBhC0fE+n89v5kimypN4dl1KCGAwRj;
type local;
}
[ok] |
To create and enable the certificate defaultDtlsSBCCert, enter the following command:
| Code Block |
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set system security pki certificate defaultDtlsSBCCert fileName defaultDtlsCert.p12 type local passPhrase gsx9000 state enabled
Commit |
| Note |
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The file defaultDtlsCert.p12 must be present while creating the certificate defaultDtlsSBCCert. |
| Anchor |
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| Creating the DTLS Profile |
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| Creating the DTLS Profile |
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Creating the DTLS Profile| Code Block |
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set profiles security dtlsProfile d1 CertName defaultDtlsSBCCert cipherSuite1 rsa-with-aes-128-cbc-sha cipherSuite2 nosuite cipherSuite3 nosuite cookieExchange enabled dtlsRole server handshakeTimer 5 hashType sha1 sessionResumpTimer 300 v1_0 enabled v1_1 disabled v1_2 disabled
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| Anchor |
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| Attaching the DTLS Profile to Trunk Group |
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| Attaching the DTLS Profile to Trunk Group |
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Attaching the DTLS Profile to | Code Block |
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% set profiles media packetServiceProfile PSP_IAD dtls dtlsFlags dtlsSrtpRelay enable dtlsSctpRelay enable |
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set addressContext default zone ZONE_ |
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WRTC sipTrunkGroup TG_SIPART_ |
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| Note |
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The Packet Service Profile can be attached to the ingress, egress, or both ingress and egress Sip Trunk Group. |
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The SRTP license must be enabled for DTLS support.
The license can be seen by executing the following command:
| Anchor |
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| Creating Crypto Suite Profile |
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| Creating Crypto Suite Profile |
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Creating Crypto Suite ProfileOn SBC ERE
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cryptoSuiteProfile cp1 entry 1 cryptoSuite AES-CM-128-HMAC-SHA1-80 |
On PSX/external PSX
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| Creating Crypto Suite Profile |
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Image Modified |
Defining SMM Rules
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| Anchor |
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| Attaching the Crypto Suite Profile to the Packet Service Profile |
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| Attaching the Crypto Suite Profile to the Packet Service Profile |
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Attaching the Crypto Suite Profile to the Packet Service ProfileOn SBC ERE
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dtlsCryptoSuiteProfile cp1 |
On PSX/external PSX
| Caption |
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| 0 | Figure |
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| 1 | Attaching Crypto Suite Profile to Packet Service Profile |
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Image Added |
| Anchor |
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| Enabling the Parameters Under DTLS Crypto Suite Profile |
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| Enabling the Parameters Under DTLS Crypto Suite Profile |
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Enabling the DTLS Crypto Suite Profile Parameters| Code Block |
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set profiles media packetServiceProfile PSP_WRTC dtls dtlsCryptoSuiteProfile cp1 dtlsFlags allowDtlsFallback enable enableDtlsSrtp enable |
| Note |
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The allowDtlsFallback parameter enables a fall back to standard RTP when corresponding leg does not have DTLS-SRTP support. If this parameter is disabled, SBC does not allow any other call other than DTLS-SRTP on that leg. |
| Anchor |
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| Enabling the DTLS SRTP and DTLS SCTP Relay Flags in Packet Service Profile |
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| Enabling the DTLS SRTP and DTLS SCTP Relay Flags in Packet Service Profile |
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Enabling the DTLS SRTP and DTLS SCTP Relay Flags in Packet Service Profile| Code Block |
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set profiles media packetServiceProfile PSP_WRTC dtls dtlsFlags dtlsSrtpRelay enable dtlsSctpRelay enable |
| Anchor |
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| Attaching the Packet Service Profile to the Sip Trunk Group |
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| Attaching the Packet Service Profile to the Sip Trunk Group |
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Attaching the Packet Service Profile to the Sip Trunk Group| Code Block |
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set addressContext default zone ZONE_WRTC sipTrunkGroup TG_SIPART_WRTC policy media packetServiceProfile PSP_WRTC |
| Note |
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The Packet Service Profile can be attached either to the ingress or the egress Sip Trunk Group between WRTC and SBC. |
LicensingThe SRTP license must be enabled for DTLS support.
The license can be seen by executing the following command:
| Code Block |
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show table system licenseInfo
LICENSE USAGE
FEATURE NAME ID EXPIRATION DATE LIMIT |
Navigate to All > License > Bundle
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Image Added |
| Anchor |
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| Opus Codec Support |
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| Opus Codec Support |
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Supporting Opus CodecThe newer versions of Chrome browser always offer support for Opus codec when creating WRTC calls. This behavior is not supported by default on the SBC and therefore, SBC removes the codec lines that it understands. However, there are some codec lines, which SBC relays as unrecognized and causes a mismatch of codec information in the SDP and the chrome browser being used for WRTC calls rejects the SDP.
There are two options to resolve this issue:
- Enabling the opus codec in External PSX or ERE
- Applying SMM Rules to Remove the Unrecognized Codec Lines
| Anchor |
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| Enabling the opus codec in External PSX or ERE |
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| Enabling the opus codec in External PSX or ERE |
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Enabling the Opus Codec in External PSX or ERE| Anchor |
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| Creating the Codec Entry in External PSX |
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| Creating the Codec Entry in External PSX |
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Creating the Codec Entry in External PSX| Caption |
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Image Added |
| Anchor |
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| Attaching the Codec Entry to the Packet Service Profile in External PSX |
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| Attaching the Codec Entry to the Packet Service Profile in External PSX |
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Attaching the Codec Entry to the Packet Service Profile in External PSX| Caption |
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| 0 | Figure |
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| 1 | Attaching the Codec Entry to PSP |
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Image Added |
| Anchor |
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| Creating Codec Entry in ERE |
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| Creating Codec Entry in ERE |
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Creating Codec Entry in ERE| Code Block |
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set profiles media codecEntry OPUS-Default codec opus packetSize 20 preferredRtpPayloadType 111 fax failureHandling continue toneTreatment none |
| Anchor |
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| Attaching Codec Entry to PSP in ERE |
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| Attaching Codec Entry to PSP in ERE |
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Attaching Codec Entry to PSP in ERE| Code Block |
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set profiles media packetServiceProfile PSP_WRTC codec codecEntry12 OPUS-Default |
| Anchor |
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| Applying SMM Rules to Remove the Unrecognized Codec Lines |
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| Applying SMM Rules to Remove the Unrecognized Codec Lines |
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Applying SMM Rules to Remove the Unrecognized Codec Lines
To remove the the unrecognized codec lines, refer to the section Defining SMM Rules.
| Anchor |
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| Defining SMM Rules |
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| Defining SMM Rules |
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Defining SMM RulesAs SBC does not support SAVPF, the following SMM rule is applied for inter-working with WRTC endpoints:
| Code Block |
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#### To replace RTP/SAVP to RTP/SAVPF ####
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 1
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 1 criterion 1 type message
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 1 criterion 1 type message message messageTypes all condition exist
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 1 action 1 type messageBody
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 1 action 1 operation regsub
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 1 action 1 regexp string "RTP/SAVP" matchInstance all
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 1 action 1 from type value value "RTP/SAVPF"
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 1 action 1 to type messageBody messageBodyValue all
set profiles signaling sipAdaptorProfile OUT_SMM_RULE state enable
commit
#### To replace actpass to active ####
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 applyMatchHeader one
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 criterion 1 type message
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 criterion 1 message
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 criterion 1 message messageTypes request all
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 criterion 1 message statusCode 200
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 criterion 2 type messageBody
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 criterion 2 messageBody
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 criterion 2 messageBody condition exist
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 type messageBody
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 operation regsub
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 from
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 from type value
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 from value "a=setup:actpass\r\n"
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 to
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 to type messageBody
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 to messageBodyValue all
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 regexp
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 regexp string "a=setup:active\r\n"
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 2 action 1 regexp matchInstance all
commit
#### To remove the unrecognized codec lines ####
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 3
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 3 criterion 1 type message
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 3 criterion 1 type message message messageTypes all condition exist
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 3 action 1 type messageBody
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 3 action 1 operation regdel
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 3 action 1 regexp string "a=rtcp-fb.*?\r\n" matchInstance all
set profiles signaling sipAdaptorProfile OUT_SMM_RULE rule 3 action 1 to type messageBody messageBodyValue all
set profiles signaling sipAdaptorProfile OUT_SMM_RULE state enable
commit
#### To delete ssrc attribute from the incoming message ####
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 applyMatchHeader one
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 criterion 1 type message
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 criterion 1 message
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 criterion 1 message messageTypes all
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 criterion 1 message statusCode 200
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 criterion 2 type messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 criterion 2 messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 criterion 2 messageBody condition exist
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 action 1 type messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 action 1 operation regdel
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 action 1 to
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 action 1 to type messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 action 1 to messageBodyValue all
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 action 1 regexp
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 action 1 regexp string "a=ssrc:.*?\r\n"
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 1 action 1 regexp matchInstance all
commit
#### To delete extmap attribute from the incoming message ####
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 applyMatchHeader one
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 criterion 1 type message
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 criterion 1 message
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 criterion 1 message messageTypes all
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 criterion 1 message statusCode 200
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 criterion 2 type messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 criterion 2 messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 criterion 2 messageBody condition exist
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 action 1 type messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 action 1 operation regdel
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 action 1 to
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 action 1 to type messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 action 1 to messageBodyValue all
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 action 1 regexp
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 action 1 regexp string "a=extmap:.*?\r\n"
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 2 action 1 regexp matchInstance all
commit
#### To delete msid-semantic attribute from the incoming message ####
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 applyMatchHeader one
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 criterion 1 type message
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 criterion 1 message
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 criterion 1 message messageTypes all
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 criterion 1 message statusCode 200
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 criterion 2 type messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 criterion 2 messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 criterion 2 messageBody condition exist
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 action 1 type messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 action 1 operation regdel
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 action 1 to
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 action 1 to type messageBody
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 action 1 to messageBodyValue all
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 action 1 regexp
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 action 1 regexp string "a=msid-semantic:.*?\r\n"
set profiles signaling sipAdaptorProfile IN_SMM_RULE rule 3 action 1 regexp matchInstance all
set profiles signaling sipAdaptorProfile IN_SMM_RULE state enable
commit |
These SMM profile is assigned to the Trunk Group towards the WRTC.
Assigning SMM Profiles to Trunk Group
The SMM profile is applied to the Trunk Group as shown below:
| Code Block |
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set addressContext default zone ZONE_WRTC sipTrunkGroup TG_SIPART_WRTC signaling messageManipulation inputAdapterProfile IN_SMM_RULE outputAdapterProfile OUT_SMM_RULE
commit |
Other Configuration
| Code Block |
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set addressContext default zone ZONE_WRTC sipTrunkGroup TG_SIPART_WRTC services natTraversal mediaNat disabled
set profiles media packetServiceProfile PSP_WRTC rtcpOptions rtcp enable |
With bundling enabled, the destination browser expects a=rtcp-mux in the sdp. To enable, rtcpMux, execute the following command:
| Code Block |
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set profiles media packetServiceProfile PSP_WRTC rtcpOptions rtcpMux enable |
| Note |
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The STUN handling for media NAT and ICE are mutually exclusive. Therefore, mediaNAT is disabled when ICE is used. For DTLS, an association is created for both RTP and RTCP. The RTCP control must be enabled for RTCP packets to flow. |
Viewing the Call Detail Status
To view the call detail status for an ICE enabled WRTC call:
| Code Block |
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show status global callDetailStatus
callDetailStatus 44 {
mediaStreams audio;
state Stable;
callingNumber 33002;
calledNumber 8095300530;
addressTransPerformed none;
origCalledNum "";
scenarioType SIP_TO_SIP;
callDuration 4;
mediaType passthru;
associatedGcid1 44;
associatedGcid2 44;
associatedGcidLegId1 1;
associatedGcidLegId2 0;
ingressSessionBandwidthkbps 76;
egressSessionBandwidthkbps 72;
ingressRemoteIpSockAddr 10.54.48.41;
ingressRemotePort 5080;
egressRemoteIpSockAddr 10.70.52.68;
egressRemotePort 5060;
ingressMediaStream1LocalIpSockAddr "10.54.45.56/ 1538 (rtcp: 1539)";
ingressMediaStream1RemoteIpSockAddr "10.70.52.68/ 63185 (rtcp: 63186)";
egressMediaStream1LocalIpSockAddr "10.54.47.56/ 1528 (rtcp: 1529)";
egressMediaStream1RemoteIpSockAddr "10.70.52.68/ 60526 (rtcp: 60527)";
ingressMediaStream1Security rtp-Encrypted,rtp-auth,srtp-terminated,rtcp-encrypted,rtcp-auth,crypto-aescm,hmacsha180;
egressMediaStream1Security rtp-disabled,rtcp-disabled;
ingressMediaStream1Bandwidth 76;
egressMediaStream1Bandwidth 72;
ingressMediaStream1IceState ST_ICE_COMPLETE;
egressMediaStream1IceState NONE;
ingressDtlsStream1 TERMINATED;
egressDtlsStream1 |
These SMM profile is assigned to the Trunk Group towards the WRTC.
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the adpAttributesSelectiveRelay control must be enabled to support WSX-SBC-WSX call scenarios. |
Assigning SMM Profiles to Trunk Group
The SMM profile is applied to the Trunk Group as shown below:
| Code Block |
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% set addressContext default zone ZONE_IAD sipTrunkGroup TG_SIPART_IAD signaling messageManipulation outputAdapterProfile OUT_SMM_RULE
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Other Configuration
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% set addressContext default zone ZONE_IAD sipTrunkGroup ATG_SIPART_IAD services natTraversal mediaNat disabled
% set profiles media packetServiceProfile PSP_IAD rtcpOptions rtcp enable |
| Note |
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The STUN handling for media NAT and ICE are mutually exclusive. Therefore, mediaNAT is disabled when ICE is used. For DTLS, an association is created for both RTP and RTCP. The RTCP control must be enabled for RTCP packets to flow. |
Viewing the Call Detail Status
To view the call detail status for an ICE enabled WRTC call:
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ing-lcl-FULL-ICE,ing-rmt-FULL-ICE,eg-lcl-NONE,eg-rmt-NONE;
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EXTERNAL;
egressTrunkName |
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The following screen shows a successful DTLS handshake packet capture:
| Caption |
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| 0 | Figure |
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| 1 | The Screen Showing a Successful DTLS Packet Capture |
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Image Modified |