Table Of Contents
Configuring Support for SIP 181 Call is Being Forwarded Message
Configuring Support for SIP 181 "Call is Being Forwarded" Message Globally
Configuring Support for SIP 181 "Call is Being Forwarded" Message at the Dial-Peer Level
Configuring Mapping of SIP Provisional Response Messages Globally
Configuring Mapping of SIP Provisional Response Messages at the Dial-Peer Level
Configuring Support for SIP 181 Call is Being Forwarded Message
You can configure support for SIP 181 Call is Being Forwarded messages either globally or on a specific dial-peer. Use the block command in voice service SIP configuration mode to globally configure Cisco IOS voice gateways and Cisco UBEs to drop specified SIP provisional response messages. To configure settings for an individual dial peer, use the voice-class sip block command in dial peer voice configuration mode. Both globally and at the dial peer level, you can also use the sdp keyword to further control when the specified SIP message is dropped based on either the absence or presence of SDP information.
Additionally, you can use commands introduced for this feature to configure a Cisco UBE, either globally or at the dial peer level, to map specific received SIP provisional response messages to a different SIP provisional response message on the outgoing SIP dial peer. To do so, use the map resp-code command in voice service SIP configuration mode for global configuration or, to configure a specific dial peer, use the voice-class sip map resp-code in dial peer voice configuration mode.
This section contains the following tasks:
•Configuring Support for SIP 181 "Call is Being Forwarded" Message Globally
•Configuring Support for SIP 181 "Call is Being Forwarded" Message at the Dial-Peer Level
•Configuring Mapping of SIP Provisional Response Messages Globally
•Configuring Mapping of SIP Provisional Response Messages at the Dial-Peer Level
Prerequisites
Cisco Unified Border Element
Cisco IOS Release 15.0(1)XA or a later release must be installed and running on your Cisco Unified Border Element.
Cisco Unified Border Element (Enterprise)
•Cisco IOS XE Release 3.1S or a later release must be installed and running on your Cisco ASR 1000 Series Router.
Configuring Support for SIP 181 "Call is Being Forwarded" Message Globally
Perform this task to configure support for SIP 181 messages at a global level in SIP configuration (conf-serv-sip) mode.
SUMMARY STEPS
1. enable
2. configure terminal
3. voice service voip
4. sip
5. block {180 | 181 | 183} [sdp {absent | present}]
6. exit
DETAILED STEPSConfiguring Support for SIP 181 "Call is Being Forwarded" Message at the Dial-Peer Level
Perform this task to configure support for SIP 181 messages at the dial-peer level, in dial peer voice configuration (config-dial-peer) mode.
SUMMARY STEPS
1. enable
2. configure terminal
3. dial-peer voice tag voip
4. voice-class sip block {180 | 181 | 183} [sdp {absent | present}]
5. exit
DETAILED STEPSConfiguring Mapping of SIP Provisional Response Messages Globally
Perform this task to configure mapping of specific received SIP provisional response messages at a global level in SIP configuration (conf-serv-sip) mode.
SUMMARY STEPS
1. enable
2. configure terminal
3. voice service voip
4. sip
5. map resp-code 181 to 183
6. exit
DETAILED STEPSConfiguring Mapping of SIP Provisional Response Messages at the Dial-Peer Level
Perform this task to configure mapping of received SIP provisional response messages at the dial-peer level, in dial peer voice configuration (config-dial-peer) mode.
SUMMARY STEPS
1. enable
2. configure terminal
3. dial-peer voice tag voip
4. voice-class sip map resp-code 181 to 183
5. exit
DETAILED STEPS