This section describes the steps to enable the transparent mode support for registering clients, using B2BUA.
Select VoIP from the Configuration Menu on the left-hand side.
Configure the system’s VoIP settings.
Configuring VoIP Parameters
Parameter | Example Configuration Value |
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Enable LLDP | Enabled (default) |
LLDP Broadcast Interval (sec) | 30 (default) |
TFTP Server IP Address | Disabled |
Use ALG Alias IP Addresses | Disabled |
Do Strict RTP Source Check | Disabled |
Enable Client List Lockdown | Disabled |
Allow Shared Usernames | Disabled |
Strip G.729 from Calls | Disabled |
Route all SIP Signalling Through B2BUA | Enabled |
Enable Microsoft Feature | Disabled |
Enable Comfort Noise Generation (CNG) | Disabled |
Enable User-Agent Header Pass-Through | Disabled |
Enable SRTP Support | Disabled |
Enable MKI Support | Disabled Note: This is optional. This depends on whether or not MKI support is enabled on MS Teams. |
H.225/H.245 Port Range | 14085-15084 (default) |
RTP Port Range | 16386-18385 (default) |
RTP Packetization Time (ms) | 20 |
Prioritize Microsoft Teams | Not Required for MS Team. The system will automatically prioritize signaling and media. This setting is used when the system is “NATing” MS Teams traffic. |
Calculate RTT | Enabled (default) |
Select VoIP > SIP from the Configuration Menu on the left-hand side.
Configure the SIP Server Settings for the B2BUA transparent mode support.
Configuring SIP Server Settings Parameters
Parameter | Example Configuration Value |
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SIP Server Address | siptrunk.example.com |
SIP Server Port | 5060 (Verify with your SIP trunking provider which SIP port to configure.) Note: If the FQDN resolves to a different port for the SIP Server Address the system will use the port returned in the DNS query response. |
SIP Server Transport | UDP |
Enable SRTP | Disabled |
Use Custom Domain | Disabled |
SIP Server Domain | Not set |
List of SIP Servers | None |
Enable Multi-homed Outbound Proxy Mode | Disabled |
Enable Transparent Proxy Mode | Enabled |
Limit Outbound to Listed SIP Servers | Enabled |
Limit Inbound to Listed SIP Servers | Enabled |
Include UPDATE in Allow | Enabled |
PRACK Support | Enabled |
GEOLOCATION Support | Disabled |
Call Audit Support | Disabled |
B2BUA Redirect Support (302) | Enabled |
Session Timer Support | Disabled |
Session Refresh Interval (s) | 1800 (default) |
UDP | Client Listening Port(s) | 5060,5070,5075 (default) |
UDP | Server Facing Port | 5060 (default) |
UDP | REGISTER Restricted to Port | 0 (default) |
TCP | Port | 5060 (default) |
TCP | Timeout (minutes) | 10 (default) |
NAT Traversal | Disabled (default) |
SDP Codec Operation | Allow only given codecs |
SDP Section that will be modified | Audio |
Codecs (comma separated list) | PCMU, PCMA, CN, telephone-event |
Reject when No Match Codec | Enabled |
Strip Matched Expressions | \ba=candidate:.*\b a=rtcp-mux \ba=ice-.*\b |
SIP Use New Port On Hold Resume | Disabled |
Priority Number 1: Priority Number 2: Priority Number 3: Priority Number 4: | Not set |
Enable SIP Statistics | Enabled |
- Click Submit to apply changes.