The following SIP trunk group signaling Relay flags are described below:

  • relayNonInviteRequest
  • relayReplacesHeader
  • relayUpdatewithSdp
Note

The relayNonInviteRequest flag applies to SIP peering scenarios only. The SBC relays all out-of-dialog non-INVITE requests from registered endpoints irrespective of the value of the Relay Non Invite Request flag.

Note

 The SBC supports up to 100 call transfers for a call.

Command Syntax

% set addressContext <name> zone <name> sipTrunkGroup <name> signaling relayNonInviteRequest <disabled | enabled>

% set addressContext <name> zone <name> sipTrunkGroup <name> signaling relayReplacesHeader <disabled | enabled>

% set addressContext <name> zone <name> sipTrunkGroup <name> signaling relayUpdatewithSdp  <disabled | enabled>

Command Parameters


Relay Flags

ParameterDescription
relayNonInviteRequestEnable this flag to relay out-of-dialog non-INVITE requests.
  • disabled (default)

  • enabled

NOTE: The relayNonInviteRequest flag applies to SIP peering scenarios only. The SBC relays all out-of-dialog non-INVITE requests from registered endpoints irrespective of the value of the Relay Non Invite Request flag.

relayReplacesHeaderEnable this flag to allow the P-CSCF to relay the Replaces header with the INVITE.
  • disabled (default) – Process INVITE locally.
  • enabled – Translate dialog identifier and relay Replaces header in INVITE.

relayUpdatewithSdp

Enable this flag to relay UPDATE request with Offer immediately after receiving or sending answer in unreliable provisional responses. This flag is applicable only in case of interworking where one side supports reliable response (from where the UPDATE is received) and the other side does not (towards which it needs to be relayed).

  • disabled (default)

  • enabled