Signaling - Global - CLI

In this section:

These sections describe configuration objects used to configure signaling at the global level. The following diagram depicts a basic signaling configuration.

Call Signaling Configuration Objects

Crankback Profile

Use the crankBackProfile parameter to assign a crankback profile at the global level. The CLI syntax is shown below.

Global Crankback Profile Option

% set global signaling crankBackProfile <profile name>

For flexibility, crankback profiles can be configured at three levels: trunk group, zone, and global. By default, the "default" crankback profile is assigned at the SBC global level, while the trunk group and zone level crankback profile settings are initially empty (" "). Thus in the SBC default configuration, trunk groups and zones inherit the default crankback profile from the global level. However, if you configure a profile at the trunk group or zone level, the user-specified profile assigned at the most specific level takes precedence.

Diameter Signaling Controls

Use this object to configure global diameter signaling controls.

Command Syntax

% set global signaling diamSigControls
	addSonusSpecificAVP <disabled | enabled>
	defaultCCF <ipAddress>
	enableRfApp <disabled | enabled>
	generateFailedEventAcr <disabled | enabled>
	maxACRretransmission <0-3>
	rfInterimAccInrvl <0-180>

Command Parameters

Diameter Signaling Control Parameters

Parameter	Length/Range	Description
`addSonusSpecificAVP`	N/A	Enable this flag to send additional CDR information within Ribbon vendor-specific Attribute Value Pairs (AVPs) in Accounting-Request (ACR) messages over the existing Rf Interface. `disabled` (default) `enabled` Note: Refer to Rf Interface Support for AVP details.
`defaultCCF`	Up to 32 characters	`<ip address>` – Specify the IP address to use as the default CCF realm configuration if CCF is not received in the PCFA. (default = 0.0.0.0).
`enableRfApp`	N/A	Use this flag to enable the Rf Accounting application at the system level to send accounting information over Rf Interface. Refer to Rf Interface Support for feature details. `disabled` (default) `enabled`
`generateFailedEventAcr`	N/A	Enable the flag to send an ACR for the failed event. `disabled` (default) `enabled`
`maxACRretransmission`	0-3	<#> – Set the maximum number of ACR retransmissions to use if the Unable to show "metadata-from": No such page "_space_variables" does not receive ACA (default = 3).
`rfInterimAccInrvl`	0-180	`<#>` – Use this parameter to specify the interim account interval value to send when no interval is received in ACA. Set the value to 0 to not send interim record (default = 30). Note: If ACA has a different value than `rfInterimAccInrvl`, this parameter is overwritten.
`sigOnlyModeValue`	N/A	This global option controls whether the SBC is in signaling-only mode. `global` – Places the Unable to show "metadata-from": No such page "_space_variables" in signaling-only mode and automatically enables direct media on all trunk groups and all IPSPs. `off` (default) Note: You can only switch the Unable to show "metadata-from": No such page "_space_variables" into or out of signaling-only mode when no active calls are present in the system.

Gateway Signaling Timers

This object allows you to configure the signaling timers for the gateway.

Command Syntax

% set global signaling gwSigTimers
   congRelDelay <delay in seconds>
   establish <timer value, in seconds>
   idle <idle time, in hours>
   keepalive <keepalive time, in seconds>
   retry <number of minutes to attempt to recover GW signaling link>
 
% show global signaling gwSigTimers
 
% delete global signaling gwSigTimers

Command Parameters

Global Gateway Signaling Timers Parameters

Parameter	Description
`congRelDelay`	Delay time (in seconds) before a release is issued for calls rejected due to congestion. (default=0)
`establish`	The Gateway Signal Channel Establishment Timer (in seconds.) This value applies to all signal channels. (default = 10).
`idle`	Idle time (in hours) for a GW Signaling Link May before it is taken down. (default = 0).
`keepalive`	The Gateway Signal Channel Keep-alive Timer (in seconds.) This value applies to all signal channels. (default = 3).
`retry`	Amount of time (in minutes) the SBC will continue to attempt to recover a GW Signaling Link as long as there are extant stable calls. (default = 60).

H.323 Signaling Timers

This object allows you to configure signaling timers for the node.

Command Syntax

% set global signaling h323SigTimers 
   establish <timer value, in seconds>
   t301 <timer value, in seconds> 
   t302 <timer value, in seconds> 
   t303 <timer value, in seconds> 
   t304 <timer value, in seconds> 
   t310 <T3timer value, in seconds10> 
   tcpConnect <tcpConnect> 

% show global signaling h323SigTimers
 
% delete global signaling h323SigTimers

Command Parameters

Global H.323 Signaling Timers Parameters

Parameter	Length/Range	Description	Default
`establish`	0-127	The H225 signal channel establishment timer (in seconds). Default value is 4.	4
`t301`	0-65535	The T301 call timer (in seconds).	180 seconds
`t302`	0-127	The T302 call timer (in seconds).	15 seconds
`t303`	0-127	The T303 call timer (in seconds).	4 seconds
`t304`	0-127	The T304 call timer (in seconds).	20 seconds
`t310`	0-127	The T310 call timer (in seconds).	10 seconds
`tcpConnect`	0-127	The TCP connect timer (in seconds).	3 seconds

Command Example

To display the global configuration of all h323SigTimers:

% show global signaling h323SigTimers  
   establish 33;  
   tcpConnect 77;  
   t301 444;  
   t302 33;  
   t303 22;  
   t304 33;  
   t310 33;

Max Num Transfers

Configure the SBC for the maximum number of transfers (10-100) allowed within a call; default is 10.

Command Syntax

% set global signaling maxNumTransfers <10-100>

Command Parameters

Max Num Transfers

Parameter	Description
`maxNumTransfers`	Specifies the maximum number of transfers (`10-100`) allowed within a call; default is `10`.

Command Example

To configure maxNumTransfers, use the following example:
```
% set global signaling maxNumTransfers 30
% commit
```

To display the maxNumTransfers, use the following example:

In the "configure" mode:

% show global signaling maxNumTransfers
maxNumTransfers 30

In the "display" mode (when you exit the "configure" mode):

> show table global signaling
maxNumTransfers 30;
messageManipulation {
    inputAdapterProfile  DD1;
    outputAdapterProfile DD1;
}
sipPeerOverloadControl {
    samplingPeriod  2;
    discardPeriod   2;
    stepDownGain    100;
    rejectThreshold 1;
}
sipSigControls {
    registrarSupportContactParam enabled;
    maxPduSizeValue              pdusize15kb;
}

SIP Message Manipulation

The SBC supports applying SIP message manipulation (SMM) profiles (SIP adaptor profiles) at the global level. Use the following parameters to assign SIP adaptor profiles that apply globally on ingress or egress. Refer to SIP Message Manipulation for more information on SMM.

Command Syntax

% set global signaling messageManipulation
      inputAdapterProfile <profile name>
      outputAdapterProfile <profile name>

Command Parameters

SIP Message Manipulation

Parameter	Description
`inputAdapterProfile`	`<profile name>` – Enter the name of a SIP adaptor profile to use globally on inbound messages.
`outputAdapterProfile`	`<profile name>` – Enter the name of a SIP adaptor profile to use globally on outbound messages.

Command Example

% set global signaling messageManipulation inputAdapterProfile globalInput 
% set global signaling messageManipulation outputAdapterProfile globalOutput
% commit

Signaling Only Mode

The SBC can be configured in a signaling-only mode so that the SBC participates in the exchange of signaling messages that set up a call but does not reserve or allocate any media resources for the session. The media component of the session is handled as direct media between the call participants.

Command Syntax

% set global signaling sigOnlyMode sigOnlyModeValue <global | off>

Command Parameters

Signaling Only Mode Parameter

Parameter Description

sigOnlyModeValue

This global option controls whether the SBC is in signaling-only mode. The options are:

global - places the SBC in signaling only mode and automatically enables direct media on all trunk groups and all IPSPs.
off (default)

Command Example

% set global signaling sigOnlyMode sigOnlyModeValue global
commit

SIP IP Peer Stats

Use this flag to configure support for SIP IP Peer Statistics in the SBC.

Command Syntax

% set global signaling sipIpPeerStats <disabled | enabled>

Command Parameters

SIP IP Peer Status

Parameter Description

sipIpPeerStats

Enable this flag to configure support for SIP IP Peer Statistics in the SBC.

disabled (default)
enabled

Command Example

To configure sipIpPeerStats, use the following example:

% set global signaling sipIpPeerStats enabled
% commit

To display the sipIpPeerStats, use the following example:

In the "configure" mode:

% show global signaling sipIpPeerStats
sipIpPeerStats enabled;

In the "display" mode (when you exit the "configure" mode):

> show table global signaling
sipIpPeerStats    enabled;
maxNumTransfers 30;
sipPeerOverloadControl {
    samplingPeriod  2;
    discardPeriod   2;
    stepDownGain    100;
    rejectThreshold 1;
}
sipSigControls {
    registrarSupportContactParam enabled;
    maxPduSizeValue              pdusize15kb;
}

SIP Peer Overload Control

This object allows you to configure SIP Peer Overload parameters.

Command Syntax

% set global signaling sipPeerOverloadControl 
   discardPeriod <1-10 seconds> 
   rejectThreshold <0-50> 
   samplingPeriod <1-10> 
   stepDownGain <1-200>
% show global signaling sipPeerOverloadControl
  
% delete global signaling sipPeerOverloadControl

Command Parameters

Global SIP Peer Overload Control Parameters

Parameter	Length/Range	Description
`discardPeriod`	1-10	Discard period (in seconds) for the Peer Overload back-off algorithm. (default = 2).
`rejectThreshold`	0-50	Specifies the reject threshold (in rejects/sec) for the Peer Overload backoff algorithm. (default = 1).
`samplingPeriod`	1-10	Specifies the sampling period (in seconds) for the Peer Overload back-off algorithm. (default = 2).
`stepDownGain`	1-200	Specifies the step-down gain for the Peer Overload back-off algorithm. (default = 100).
`displaylevel`	1-64	To display different levels of output information in show commands.

Command Example

To display the global configuration of all SIP overload control:

% show global signaling sipPeerOverloadControl  
   samplingPeriod 2;  
   discardPeriod 1;  
   stepDownGain 44;  
   rejectThreshold 33;

SIP Signaling Controls

Use this object to configure SIP signaling control parameters.

Command Syntax

% set global signaling sipSigControls 
	egressRemoveEnudmi <disabled | enabled>
    egressRNParam <disabled | enabled> 
	loopDetectionFeature <disabled | enabled> 
	maxPduSizeValue <pdusize2kb | pdusize3kb | pdusize6kb | pdusize15kb | pdusize32kb | pdusize60kb> 
	multipleContactsPerAor <disabled | enabled>
	registrarSupportContactParam <disabled | enabled>
    send503DuringSwitchover <disabled | enabled>
	sendDeRegisterContactAsStar <disabled | enabled>
	sendSurrogateUnRegAfterReboot <disabled | enabled>
	suppressErrorInfoHdr <disabled | enabled>
	surrogateRegisterPacingTime <0-10000>
	ucidNodeId <node_id>
    offerAnswerTimer <10-300>

 % show global signaling sipSigControls
 
% delete global signaling sipSigControls

Command Parameters

Global SIP Signaling Control Parameters

Parameter	Length/Range	Description
`egressRemoveEnudmi`	NA	Controls whether the SBC removes the `enumdi` (ENUM dip indicator) parameter from the egress Request-URI that the SBC inserts when the PSX does an ENUM query. The options are: `disabled` (default) - The SBC includes the `enumdi` parameter in the egress Request-URI when the PSX does an ENUM query. `enabled` - The SBC does not include the `enumdi` parameter in the egress Request-URI even if the PSX does an ENUM query.
`egressRNParam`	N/A	Enable this flag to send a Redirecting Number Information Element (RNIE) in the egress leg of the call per RFC3398 when the R-URI and the To header differ. `disabled` `enabled` (default)
`loopDetectionFeature`	N/A	When enabled, the SIP Stack performs loop detection on incoming INVITE messages. `disabled` – The SIP signaling group processes the INVITE message. `enabled` (default)
`maxPduSizeValue`	N/A	The maximum PDU size recognized by the Unable to show "metadata-from": No such page "_space_variables" : `pdusize2kb` – 2,048 bytes `pdusize3kb` – 3,072 bytes `pdusize6kb` – 6,000 bytes `pdusize15kb` (default) – 15,000 bytes `pdusize32kb` – 32,000 bytes `pdusize60kb` – 60,000 bytes
`multipleContactsPerAor`	N/A	Use this flag to support multiple contacts per Address Of Record (AoR). `disabled` – Only a single contact per Address of Record is supported. `enabled` (default) – The SBC maintains different RCBs for each new registration and verifies the source IP address and port during Registration Control Block (RCB) lookup. The SBC supports validating the source IP address and the port even if `multipleContactsPerAor` flag is disabled. The SBC also supports locating the RCB using the AoR to perform additional validation on the source IP address and port if the parameter `requireRegistration` is set to "required" or "required-non-priority". This is applicable for both calls and OOD requests that are originated from the IAD. In case of refresh registration that is originated from a different IP/port, the SBC forwards the request to the registrar and move the sate to "UPDATING". Any calls or OOD requests that are originated from the IAD while the RCB is in updating state must be validated using the previously authenticated IP/port. When the flag `multipleContactsPerAor` is enabled, the SBC maintains different RCBs for each new registration. A registration is considered new when the source IP/port of the REGISTER request is different from earlier registration for the same AoR. Any of the registered UEs may initiate a communication on behalf of the AoR, and the SBC fetches the corresponding RCB based on source IP port of the UE. Note: Refer to Multiple Contacts per AoR feature page for additional details. Note: Even though the default value of `multipleContactsPerAor` is "enabled", during an upgrade the value can be either "enabled" or "disabled".
`registrarSupportContactParam`	N/A	Enable flag to support parameters in the Contact header: `disabled` – Parameters in the Contact header are not supported. This value is provided only for backwards compatibility. `enabled` (default) – Parameters in the Contact header are supported.
`send503DuringSwitchover`	N/A	Use this flag to control the sending of 503 message during a switchover. `disabled` – The request is dropped with no 503 messages sent for Invites. `enabled` (default) – Send 503 message during a switchover. Note: The Retry-after tag is set to 60 seconds once the 503 message is sent.
`sendDeRegisterContactAsStar`	N/A	Enable this flag to allow the Unable to show "metadata-from": No such page "_space_variables" to send the Contact header as a star (*) in DEREGISTER messages if `multipleContactsPerAor` is disabled. `disabled` `enabled` (default)
`sendSurrogateUnRegAfterReboot`	N/A	Enable flag to trigger de-register messages to all AORs configured to use the Surrogate Registration feature after a reboot. `disabled` (default) `enabled`
`suppressErrorInfoHdr`	N/A	Enable flag to suppress Error-Info header in a response to a request message with syntax error. `disabled` (default) – The SBC includes Error-info header in the response. `enabled` – The SBC does not include Error-Info header in an error status.
`surrogateRegisterPacingTime`	0-10000	Use this parameter to specify the time gap, in milliseconds, between a final response of surrogate register and the next surrogate register message sent across all peers. (default = 0, disabled) If surrogate registration is active and you wish to disable pacing, first disable surrogate registration for each peer using following command syntax: `% set addressContext <AC name> zone <zone name> ipPeer <peer name> surrogateRegistration state disabled` Note: Fully research the feature to understand pacing semantics before using it. This setting is not required in generic deployments. Pacing is applied to all surrogate REGISTER requests generated for all surrogate AoRs.
`ucidNodeId`	1-32767	UCID Node Id used to generate the UCID in the User-to-User Header. (default = 0)
`offerAnswerTimer`	10 - 300 seconds	Specify the number of seconds for the Unable to show "metadata-from": No such page "_space_variables" to wait for the Offer-Answer handshake to complete before timing out. Once configured, the Unable to show "metadata-from": No such page "_space_variables" uses this value for all subsequent calls. For backward compatibility, set the `offerAnswerTimer` to its default value for SIP signaling gateway. Default: 20 seconds Note: The `offerAnswerTimer` goes beyond transaction timeout value only for Re-INVITE transactions. For Media Resource Function timer (MRF) calls, if the `offerAnswerTimer` value has a value more than MRF timer value, which is currently hard coded to 72 seconds , the call disconnects on MRF timer timeout, irrespective of the `offerAnswerTimer` timer value.

Command Example

To display the global configuration of all SIP signaling control parameters:

% show global signaling sipSigControls
    loopDetectionFeature         enabled;
    registrarSupportContactParam enabled;
    suppressErrorInfoHdr         enabled;
    maxPduSizeValue              pdusize3kb;
    egressRNParam                enabled;
    multipleContactsPerAor       enabled;
    surrogateRegisterPacingTime  enabled;
    ucidNodeId                   13;
    offerAnswerTimer             28
     }

Single Radio Voice Call Continuity (SRVCC)

SRVCC provides the ability to transition a voice call from the VoIP/IMS packet domain (LTE) to the legacy circuit domain. Variations of SRVCC are being standardized to support both GSM/UMTS and CDMA 1x circuit domains. For an operator with a legacy cellular network who wishes to deploy IMS/VoIP-based voice services in conjunction with the rollout of an LTE network, SRVCC offers VoIP subscribers with coverage over a much larger area than would typically be available during the roll-out of a new network.

Command Syntax

% set global signaling srvcc
    atcfUri (1-63 chars)
    callLingerTimer (1-32 seconds)
    eStnSr (1-32 chars)
	pstopsSti (0-32 chars)
    stnSr (1-32 chars)

Command Parameters

Global SRVCC Parameters

Parameter	Length/Range	Description
`atcfUri`	1-63 characters	The SIP URI to be used as the ATCF Path and Management URI.
`callLingerTimer`	1-32 seconds	Number of seconds to wait for INVITE due to STN_SR before clearing the call (default=32).
`eStnSr`	0-32 characters	The Request URI for a emergency transfer call sent by MSC on PS to CS call hand-off. Acceptable characters: alphabetical (upper- and lower-case), numerical (0-9) and any of the following special characters: +,-,.,(,)
`pstopsSti`	0-32 characters	The Request URI for a Packet-Switched-to-Packet-Switched (PS-to-PS) optimized hand-over call. Acceptable characters: alphabetical (upper- and lower-case), numerical (0-9) and any of the following special characters: +,-,.,(,)
`stnSr`	0-32 characters	The Request URI for a transfer call sent by MSC on PS to CS call hand-off. Acceptable characters: alphabetical (upper- and lower-case), numerical (0-9) and any of the following special characters: +,-,.,(,)

Command Example

set global signaling srvcc pstopsSti +1-pstopsSti-222
commit

show global signaling srvcc pstopsSti
pstopsSti +1-pstopsSti-222;

Teams Support

The SBC supports special behavior of SIP Signaling, when interfacing with Microsoft Teams.

Command Syntax

% set global signaling teamsSupport <disabled | enabled>

Command Parameters

Teams Support

Parameter Description

teamsSupport

Enable this flag to configure SIP Signaling for interfacing with MS Teams.

Note: When you enable this global control, the SBC sends out both SDES and DTLS in the offer, if both are enabled in the Packet Service Profile. This might only be required if there is a Microsoft Teams client running in a browser.

disabled (default)
enabled

Command Example

To configure sipIpPeerStats, use the following example:
```
% set global signaling teamsSupport enabled
% commit
```

To display the teamsSupport, use the following example:

In the "configure" mode:

% show global signaling teamsSupport
teamsSupport enabled;

In the "display" mode (when you exit the "configure" mode):

> show table global signaling
teamsSupport    enabled;
maxNumTransfers 30;
sipPeerOverloadControl {
    samplingPeriod  2;
    discardPeriod   2;
    stepDownGain    100;
    rejectThreshold 1;
}
sipSigControls {
    registrarSupportContactParam enabled;
    maxPduSizeValue              pdusize15kb;
}

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Signaling - Global - CLI

Crankback Profile

Diameter Signaling Controls

Command Syntax

Command Parameters

Gateway Signaling Timers

Command Syntax

Command Parameters

H.323 Signaling Timers

Command Syntax

Command Parameters

Command Example

Max Num Transfers

Command Syntax

Command Parameters

Command Example

SIP Message Manipulation

Command Syntax

Command Parameters

Command Example

Signaling Only Mode

Command Syntax

Command Parameters

Command Example

SIP IP Peer Stats

Command Syntax

Command Parameters

Command Example

SIP Peer Overload Control

Command Syntax

Command Parameters

Command Example

SIP Signaling Controls

Command Syntax

Command Parameters

Command Example

Single Radio Voice Call Continuity (SRVCC)

Command Syntax

Command Parameters

Command Example

Teams Support

Command Syntax

Command Parameters

Command Example