Cisco Unified Border Element (Enterprise) SIP Support Configuration Guide, Cisco IOS XE Release 3S
Support for PAID PPID Privacy PCPID and PAURI Headers on the Cisco Unified Border Element
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Support for PAID PPID Privacy PCPID and PAURI Headers on the Cisco Unified Border Element

Contents

Support for PAID PPID Privacy PCPID and PAURI Headers on the Cisco Unified Border Element

The figure below shows a typical network topology where the Cisco Unified Border Element is configured to route messages between a call manager system (such as the Cisco Unified Call Manager) and a Next Generation Network (NGN).

Figure 1. Cisco Unified Border Element and Next Generation Topology

Devices that connect to an NGN must comply with the User-Network Interface (UNI) specification. The Cisco Unified Border Element supports the NGN UNI specification and can be configured to interconnect NGN with other call manager systems, such us the Cisco Unified Call Manager.

The Cisco Unified Border Element supports the following:

  • the use of P-Preferred Identity (PPID), P-Asserted Identity (PAID), Privacy, P-Called Party Identity (PCPID), in INVITE messages
  • the translation of PAID headers to PPID headers and vice versa
  • the translation of From: or RPID headers to PAID or PPID headers and vice versa
  • the configuration and/or pass through of privacy header values
  • the use of the PCPID header to route INVITE messages
  • the use of multiple PAURI headers in the response messages (200 OK) it receives to REGISTER messages

P-Preferred Identity and P-Asserted Identity Headers

NGN servers use the PPID header to identify the preferred number that the caller wants to use. The PPID is part of INVITE messages sent to the NGN. When the NGN receives the PPID, it authorizes the value, generates a PAID based on the preferred number, and inserts it into the outgoing INVITE message towards the called party.

However, some call manager systems, such as Cisco Unified Call Manager 5.0, use the Remote-Party Identity (RPID) value to send calling party information. Therefore, the Cisco Unified Border Element must support building the PPID value for an outgoing INVITE message to the NGN, using the RPID value or the From: value received in the incoming INVITE message. Similarly, CUBE supports building the RPID and/or From: header values for an outgoing INVITE message to the call manager, using the PAID value received in the incoming INVITE message from the NGN.

In non-NGN systems, the Cisco Unified Border Element can be configured to translate between PPID and PAID values, and between From: or RPID values and PAID/PPID values, at global and dial-peer levels.

In configurations where all relevant servers support the PPID or PAID headers, the Cisco Unified Border Element can be configured to transparently pass the header.


Note


If the NGN sets the From: value to anonymous, the PAID is the only value that identifies the caller.


The table below describes the types of INVITE message header translations supported by the Cisco Unified Border Element. It also includes information on the configuration commands to use to configure P-header translations.

The table below shows the P-header translation configuration settings only. In addition to configuring these settings, you must configure other system settings (such as the session protocol).

Table 1 P-header Configuration Settings

Incoming Header

Outgoing Header

Configuration Notes

From:

PPID

To enable the translation to PPID headers in the outgoing header at a global level, use the asserted-id ppi command in voice service VoIP SIP configuration mode. For example: Router(conf-serv-sip)# asserted-id ppi

To enable the translation to PPID headers in the outgoing header on a specific dial peer, use the voice-class sip asserted-id ppi command in dial peer voice configuration mode. For example: Router(config-dial-peer)# voice-class sip asserted-id ppi

From:

PAID

To enable the translation to PAID headers in the outgoing header at a global level, use the asserted-id pai command in voice service VoIP SIP configuration mode. For example: Router(conf-serv-sip)# asserted-id pai

To enable the translation to PAID headers in the outgoing header on a specific dial peer, use the voice-class sip asserted-id pai command in dial peer voice configuration mode. For example: Router(config-dial-peer)# voice-class sip asserted-id pai

From:

RPID

To enable the translation to RPID headers in the outgoing header, use the remote-party-id command in SIP user-agent configuration mode. For example: Router(config-sip-ua)# remote-party-id

This is the default system behavior.

Note   

If both, remote-party-id and asserted-id commands are configured, then the asserted-id command takes precedence over the remote-part-id command.

PPID

PAID

To enable the translation to PAID privacy headers in the outgoing header at a global level, use the asserted-id pai command in voice service VoIP SIP configuration mode. For example: Router(conf-serv-sip)# asserted-id pai

To enable the translation to PAID privacy headers in the outgoing header on a specific dial peer, use the voice-class sip asserted-id pai command in dial peer voice configuration mode. For example: Router(config-dial-peer)# voice-class sip asserted-id pai

PPID

From:

By default, the translation to RPID headers is enabled and the system translates PPID headers in incoming messages to RPID headers in the outgoing messages. To disable the default behavior and enable the translation from PPID to From: headers, use the no remote-party-id command in SIP user-agent configuration mode. For example: Router(config-sip-ua)# no remote-party-id

PPID

RPID

To enable the translation to RPID headers in the outgoing header, use the remote-party-id command in SIP user-agent configuration mode. For example: Router(config-sip-ua)# remote-party-id

This is the default system behavior.

PAID

PPID

To enable the translation to PPID privacy headers in the outgoing header at a global level, use the asserted-id ppi command in voice service VoIP SIP configuration mode. For example: Router(conf-serv-sip)# asserted-id ppi

To enable the translation to PPID privacy headers in the outgoing header on a specific dial peer, use the voice-class sip asserted-id ppi command in dial peer voice configuration mode. For example: Router(config-dial-peer)# voice-class sip asserted-id ppi

PAID

From:

By default, the translation to RPID headers is enabled and the system translates PPID headers in incoming messages to RPID headers in the outgoing messages. To disable the default behavior and enable the translation from PPID to From: headers, use the no remote-party-id command in SIP user-agent configuration mode. For example: Router(config-sip-ua)# no remote-party-id

PAID

RPID

To enable the translation to RPID headers in the outgoing header, use the remote-party-id command in SIP user-agent configuration mode. For example: Router(config-sip-ua)# remote-party-id

This is the default system behavior.

RPID

PPID

To enable the translation to PPID privacy headers in the outgoing header at a global level, use the asserted-id ppi command in voice service VoIP SIP configuration mode. For example: Router(conf-serv-sip)# asserted-id ppi

To enable the translation to PPID privacy headers in the outgoing header on a specific dial peer, use the voice-class sip asserted-id ppi command in dial peer voice configuration mode. For example: Router(config-dial-peer)# voice-class sip asserted-id ppi

RPID

PAID

To enable the translation to PAID privacy headers in the outgoing header at a global level, use the asserted-id pai command in voice service VoIP SIP configuration mode. For example: Router(conf-serv-sip)# asserted-id pai

To enable the translation to PAID privacy headers in the outgoing header on a specific dial peer, use the voice-class sip asserted-id pai command in dial peer voice configuration mode. For example: Router(config-dial-peer)# voice-class sip asserted-id pai

RPID

From:

By default, the translation to RPID headers is enabled and the system translates PPID headers in incoming messages to RPID headers in the outgoing messages. To disable the default behavior and enable the translation from PPID to From: headers, use the no remote-party-id command in SIP user-agent configuration mode. For example: Router(config-sip-ua)# no remote-party-id

Privacy

If the user is subscribed to a privacy service, the Cisco Unified Border Element can support privacy using one of the following methods:

  • Using prefixes

The NGN dial plan can specify prefixes to enable privacy settings. For example, the dial plan may specify that if the caller dials a prefix of 184, the calling number is not sent to the called party.

The dial plan may also specify that the caller can choose to send the calling number to the called party by dialing a prefix of 186. Here, the Cisco Unified Border Element transparently passes the prefix as part of the called number in the INVITE message.

The actual prefixes for the network are specified in the dial plan for the NGN, and can vary from one NGN to another.

  • Using the Privacy header

If the Privacy header is set to None, the calling number is delivered to the called party. If the Privacy header is set to a Privacy:id value, the calling number is not delivered to the called party.

  • Using Privacy values from the peer call leg

If the incoming INVITE has a Privacy header or a RPID with privacy on, the outgoing INVITE can be set to Privacy: id. This behavior is enabled by configuring privacy pstn command globally or voice-class sip privacy pstn command on the selected dial-per.

Incoming INVITE can have multiple privacy header values, id, user, session, and so on. Configure the privacy-policy passthru command globally or voice-class sip privacy-policy passthru command to transparently pass across these multiple privacy header values.

Some NGN servers require a Privacy header to be sent even though privacy is not required. In this case the Privacy header must be set to none. The Cisco Unified Border Element can add a privacy header with the value None while forwarding the outgoing INVITE to NGN. Configure the privacy-policy send-always globally or voice-class sip privacy-policy send-always command in dial-peer to enable this behavior.

If the user is not subscribed to a privacy service, the Cisco Unified Border Element can be configured with no Privacy settings.

P-Called Party Identity

The Cisco Unified Border Element can be configured to use the PCPID header in an incoming INVITE message to route the call, and to use the PCPID value to set the To: value of outgoing INVITE messages.

The PCPID header is part of the INVITE messages sent by the NGN, and is used by Third Generation Partnership Project (3GPP) networks. The Cisco Unified Border Element uses the PCPID from incoming INVITE messages (from the NGN) to route calls to the Cisco Unified Call Manager.


Note


The PCPID header supports the use of E.164 numbers only.


P-Associated URI

The Cisco Unified Border Element supports the use of PAURI headers sent as part of the registration process. After the Cisco Unified Border Element sends REGISTER messages using the configured E.164 number, it receives a 200 OK message with one or more PAURIs. The number in the first PAURI (if present) must match the contract number. The Cisco Unified Border Element supports a maximum of six PAURIs for each registration.


Note


The Cisco Unified Border Element performs the validation process only when a PAURI is present in the 200 OK response.


The registration validation process works as follows:

  • The Cisco Unified Border Element receives a REGISTER response message that includes PAURI headers that include the contract number and up to five secondary numbers.
  • The Cisco Unified Border Element validates the contract number against the E.164 number that it is registering:
    • If the values match, the Cisco Unified Border Element completes the registration process and stores the PAURI value. This allows administration tools to view or retrieve the PAURI if needed.
    • If the values do not match, the Cisco Unified Border Element unregisters and then reregisters the contract number. The Cisco Unified Border Element performs this step until the values match.

Random Contact Support

The Cisco Unified Border Element can use random-contact information in REGISTER and INVITE messages so that user information is not revealed in the contact header.

To provide random contact support, the Cisco Unified Border Element performs SIP registration based on the random-contact value. The Cisco Unified Border Element then populates outgoing INVITE requests with the random-contact value and validates the association between the called number and the random value in the Request-URI of the incoming INVITE. The Cisco Unified Border Element routes calls based on the PCPID, instead of the Request-URI which contains the random value used in contact header of the REGISTER message.

The default contact header in REGISTER messages is the calling number. The Cisco Unified Border Element can generate a string of 32 random alphanumeric characters to replace the calling number in the REGISTER contact header. A different random character string is generated for each pilot or contract number being registered. All subsequent registration requests will use the same random character string.

The Cisco Unified Border Element uses the random character string in the contact header for INVITE messages that it forwards to the NGN. The NGN sends INVITE messages to the Cisco Unified Border Element with random-contact information in the Request URI. For example: INVITE sip:FefhH3zIHe9i8ImcGjDD1PEc5XfFy51G@10.12.1.46:5060.

The Cisco Unified Border Element will not use the To: value of the incoming INVITE message to route the call because it might not identify the correct user agent if supplementary services are invoked. Therefore, the Cisco Unified Border Element must use the PCPID to route the call to the Cisco Unified Call Manager. You can configure routing based on the PCPID at global and dial-peer levels.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for Support for PAID PPID Privacy PCPID and PAURI Headers on the Cisco UBE

Cisco Unified Border Element

  • Cisco IOS Release 12.4(22)YB 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.

Restrictions for Support for PAID PPID Privacy PCPID and PAURI Headers on the Cisco UBE

  • To enable random-contact support, you must configure the Cisco Unified Border Element to support SIP registration with random-contact information. In addition, you must configure random-contact support in VoIP voice-service configuration mode or on the dial peer.
  • If random-contact support is configured for SIP registration only, the system generates the random-contact information, includes it in the SIP REGISTER message, but does not include it in the SIP INVITE message.
  • If random-contact support is configured in VoIP voice-service configuration mode or on the dial peer only, no random contact is sent in either the SIP REGISTER or INVITE message.

Configuring P-Header and Random-Contact Support on the Cisco Unified Border Element

To enable random contact support you must configure the Cisco Unified Border Element to support Session Initiation Protocol (SIP) registration with random-contact information, as described in this section.

To enable the Cisco Unified Border Element to use the PCPID header in an incoming INVITE message to route the call, and to use the PCPID value to set the To: value of outgoing INVITE messages, you must configure P-Header support as described in this section.

Configuring P-Header Translation on a Cisco Unified Border Element

To configure P-Header translations on a Cisco Unified Border Element, perform the steps in this section.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    voice service voip

    4.    sip

    5.    asserted-id header-type

    6.    exit


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Router> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.
     
    Step 2 configure terminal


    Example:
    Router# configure terminal
     

    Enters global configuration mode.

     
    Step 3 voice service voip


    Example:
    Router(config)# voice service voip
     

    Enters VoIP voice-service configuration mode.

     
    Step 4 sip


    Example:
    Router(conf-voi-serv)# sip
     

    Enters voice service VoIP SIP configuration mode.

     
    Step 5 asserted-id header-type


    Example:
    Router(conf-serv-sip)# asserted-id ppi
     

    Specifies the type of privacy header in the outgoing SIP requests and response messages.

     
    Step 6 exit


    Example:
    Router(conf-serv-sip)# exit
     

    Exits the current mode.

     

    Configuring P-Header Translation on an Individual Dial Peer

    To configure P-Header translation on an individual dial peer, perform the steps in this section.

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    dial-peer voice tag voip

      4.    voice-class sip asserted-id header-type

      5.    exit


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 enable


      Example:
      Router> enable
       

      Enables privileged EXEC mode.

      • Enter your password if prompted.
       
      Step 2 configure terminal


      Example:
      Router# configure terminal
       

      Enters global configuration mode.

       
      Step 3 dial-peer voice tag voip


      Example:
      Router(config)# dial-peer voice 2611 voip
       

      Defines the dial peer, specifies the method of voice encapsulation, and enters dial peer voice configuration mode.

       
      Step 4 voice-class sip asserted-id header-type


      Example:
      Router(config-dial-peer)# voice-class sip asserted-id ppi
       

      Specifies the type of privacy header in the outgoing SIP requests and response messages, on this dial peer.

       
      Step 5 exit


      Example:
      Router(config-dial-peer)# exit
       

      Exits the current mode.

       

      Configuring P-Called-Party-Id Support on a Cisco Unified Border Element

      To configure P-Called-Party-Id support on a Cisco Unified Border Element, perform the steps in this section.

      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    voice service voip

        4.    sip

        5.    call-route p-called-party-id

        6.    random-request-uri validate

        7.    exit


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 enable


        Example:
        Router> enable
         

        Enables privileged EXEC mode.

        • Enter your password if prompted.
         
        Step 2 configure terminal


        Example:
        Router# configure terminal
         

        Enters global configuration mode.

         
        Step 3 voice service voip


        Example:
        Router(config)# voice service voip
         

        Enters VoIP voice-service configuration mode.

         
        Step 4 sip


        Example:
        Router(conf-voi-serv)# sip
         

        Enters voice service VoIP SIP configuration mode.

         
        Step 5 call-route p-called-party-id


        Example:
        Router(conf-serv-sip)# call-route p-called-party-id
         

        Enables the routing of calls based on the PCPID header.

         
        Step 6 random-request-uri validate


        Example:
        Router(conf-serv-sip)# random-request-uri validate
         

        Enables the validation of the random string in the Request URI of the incoming INVITE message.

         
        Step 7 exit


        Example:
        Router(conf-serv-sip)# exit
         

        Exits the current mode.

         

        Configuring P-Called-Party-Id Support on an Individual Dial Peer

        To configure P-Called-Party-Id support on an individual dial peer, perform the steps in this section.

        SUMMARY STEPS

          1.    enable

          2.    configure terminal

          3.    dial-peer voice tag voip

          4.    voice-class sip call-route p-called-party-id

          5.    voice-class sip random-request-uri validate

          6.    exit


        DETAILED STEPS
           Command or ActionPurpose
          Step 1 enable


          Example:
          Router> enable
           

          Enables privileged EXEC mode.

          • Enter your password if prompted.
           
          Step 2 configure terminal


          Example:
          Router# configure terminal
           

          Enters global configuration mode.

           
          Step 3 dial-peer voice tag voip


          Example:
          Router(config)# dial-peer voice 2611 voip
           

          Defines the dial peer, specifies the method of voice encapsulation, and enters dial peer voice configuration mode.

           
          Step 4 voice-class sip call-route p-called-party-id


          Example:
          Router(config-dial-peer)# voice-class sip call-route p-called-party-id
           

          Enables the routing of calls based on the PCPID header on this dial peer.

           
          Step 5 voice-class sip random-request-uri validate


          Example:
          Router(config-dial-peer)# voice-class sip random-request-uri validate
           

          Enables the validation of the random string in the Request URI of the incoming INVITE message on this dial peer.

           
          Step 6 exit


          Example:
          Router(config-dial-peer)# exit
           

          Exits the current mode.

           

          Configuring Privacy Support on a Cisco Unified Border Element

          To configure privacy support on a Cisco Unified Border Element, perform the steps in this section.

          SUMMARY STEPS

            1.    enable

            2.    configure terminal

            3.    voice service voip

            4.    sip

            5.    privacy privacy-option

            6.    privacy-policy privacy-policy-option

            7.    exit


          DETAILED STEPS
             Command or ActionPurpose
            Step 1 enable


            Example:
            Router> enable
             

            Enables privileged EXEC mode.

            • Enter your password if prompted.
             
            Step 2 configure terminal


            Example:
            Router# configure terminal
             

            Enters global configuration mode.

             
            Step 3 voice service voip


            Example:
            Router(config)# voice service voip
             

            Enters VoIP voice-service configuration mode.

             
            Step 4 sip


            Example:
            Router(conf-voi-serv)# sip
             

            Enters voice service VoIP SIP configuration mode.

             
            Step 5 privacy privacy-option


            Example:
            Router(conf-serv-sip)# privacy id
             

            Enables the privacy settings for the header.

             
            Step 6 privacy-policy privacy-policy-option


            Example:
            Router(conf-serv-sip)# privacy-policy passthru
             

            Specifies the privacy policy to use when passing the privacy header from one SIP leg to the next.

             
            Step 7 exit


            Example:
            Router(conf-serv-sip)# exit
             

            Exits the current mode.

             

            Configuring Privacy Support on an Individual Dial Peer

            To configure privacy support on an individual dial peer, perform the steps in this section.

            SUMMARY STEPS

              1.    enable

              2.    configure terminal

              3.    dial-peer voice tag voip

              4.    voice-class sip privacy privacy-option

              5.    voice-class sip privacy-policy privacy-policy-option

              6.    exit


            DETAILED STEPS
               Command or ActionPurpose
              Step 1 enable


              Example:
              Router> enable
               

              Enables privileged EXEC mode.

              • Enter your password if prompted.
               
              Step 2 configure terminal


              Example:
              Router# configure terminal
               

              Enters global configuration mode.

               
              Step 3 dial-peer voice tag voip


              Example:
              Router(config)# dial-peer voice 2611 voip
               

              Defines the dial peer, specifies the method of voice encapsulation, and enters dial peer voice configuration mode.

               
              Step 4 voice-class sip privacy privacy-option


              Example:
              Router(config-dial-peer)# voice-class sip privacy id
               

              Enables the privacy settings for the header on this dial peer.

               
              Step 5 voice-class sip privacy-policy privacy-policy-option


              Example:
              Router(config-dial-peer)# voice-class sip privacy-policy passthru
               

              Specifies the privacy policy to use when passing the privacy header from one SIP leg to the next, on this dial peer.

               
              Step 6 exit


              Example:
              Router(config-dial-peer)# exit
               

              Exits the current mode.

               

              Configuring Random-Contact Support on a Cisco Unified Border Element

              To configure random-contact support on a Cisco Unified Border Element, perform the steps in this section.

              SUMMARY STEPS

                1.    enable

                2.    configure terminal

                3.    sip-ua

                4.    credentials username username password password realm domain-name

                5.    registrar ipv4: destination-address random-contact expires expiry

                6.    exit

                7.    voice service voip

                8.    sip

                9.    random-contact

                10.    exit


              DETAILED STEPS
                 Command or ActionPurpose
                Step 1 enable


                Example:
                Router> enable
                 

                Enables privileged EXEC mode.

                • Enter your password if prompted.
                 
                Step 2 configure terminal


                Example:
                Router# configure terminal
                 

                Enters global configuration mode.

                 
                Step 3 sip-ua


                Example:
                Router(config)# sip-ua
                 

                Enters SIP user-agent configuration mode.

                 
                Step 4 credentials username username password password realm domain-name


                Example:
                Router(config-sip-ua)# credentials username 123456 password cisco realm cisco
                 

                Sends a SIP registration message from the Cisco Unified Border Element.

                 
                Step 5 registrar ipv4: destination-address random-contact expires expiry


                Example:
                Router(config-sip-ua)# registrar ipv4:10.1.2.2 random-contact expires 200
                 

                Enables the SIP gateways to register E.164 numbers on behalf of analog telephone voice ports (FXS), IP phone virtual voice ports (EFXS), and Skinny Client Control Protocol (SCCP) phones with an external SIP proxy or SIP registrar.

                • The random-contact keyword configures the Cisco Unified Border Element to send the random string from the REGISTER message to the registrar.
                 
                Step 6 exit


                Example:
                Router(config-sip-ua)# exit
                 

                Exits the current mode.

                 
                Step 7 voice service voip


                Example:
                Router(config)# voice service voip
                 

                Enters VoIP voice-service configuration mode.

                 
                Step 8 sip


                Example:
                Router(conf-voi-serv)# sip
                 

                Enters voice service VoIP SIP configuration mode.

                 
                Step 9 random-contact


                Example:
                Router(conf-serv-sip)# random-contact
                 

                Enables random-contact support on a Cisco Unified Border Element.

                 
                Step 10 exit


                Example:
                Router(conf-serv-sip)# exit
                 

                Exits the current mode.

                 

                Configuring Random-Contact Support for an Individual Dial Peer

                To configure configure random-contact support for an individual dial peer, perform the steps in this section.

                SUMMARY STEPS

                  1.    enable

                  2.    configure terminal

                  3.    sip-ua

                  4.    credentials username username password password realm domain-name

                  5.    registrar ipv4: destination-address random-contact expires expiry

                  6.    exit

                  7.    dial-peer voice tag voip

                  8.    voice-class sip random-contact

                  9.    exit


                DETAILED STEPS
                   Command or ActionPurpose
                  Step 1 enable


                  Example:
                  Router> enable
                   

                  Enables privileged EXEC mode.

                  • Enter your password if prompted.
                   
                  Step 2 configure terminal


                  Example:
                  Router# configure terminal
                   

                  Enters global configuration mode.

                   
                  Step 3 sip-ua


                  Example:
                  Router(config)# sip-ua
                   

                  Enters SIP user-agent configuration mode.

                   
                  Step 4 credentials username username password password realm domain-name


                  Example:
                  Router(config-sip-ua)# credentials username 123456 password cisco realm cisco
                   

                  Sends a SIP registration message from the Cisco Unified Border Element.

                   
                  Step 5 registrar ipv4: destination-address random-contact expires expiry


                  Example:
                  Router(config-sip-ua)# registrar ipv4:10.1.2.2 random-contact expires 200
                   

                  Enables the SIP gateways to register E.164 numbers on behalf of FXS, EFXS, and SCCP phones with an external SIP proxy or SIP registrar.

                  • The random-contact keyword configures the Cisco Unified Border Element to send the random string from the REGISTER message to the registrar.
                   
                  Step 6 exit


                  Example:
                  Router(config-sip-ua)# exit
                   

                  Exits the current mode.

                   
                  Step 7 dial-peer voice tag voip


                  Example:
                  Router(config)# dial-peer voice 2611 voip
                   

                  Defines the dial peer, specifies the method of voice encapsulation, and enters dial peer voice configuration mode.

                   
                  Step 8 voice-class sip random-contact


                  Example:
                  Router(config-dial-peer)# voice-class sip random-contact
                   

                  Enables random-contact support on this dial peer.

                   
                  Step 9 exit


                  Example:
                  Router(config-dial-peer)# exit
                   

                  Exits the current mode.

                   

                  Feature Information for PAID PPID Privacy PCPID and PAURI Headers on the Cisco Unified Border Element

                  The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

                  Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

                  Feature History Table entry for the Cisco Unified Border Element.

                  Table 2 Feature Information for PAID, PPID, Privacy, PCPID, and PAURI Headers on the UBE

                  Feature Name

                  Releases

                  Feature Information

                  PAID, PPID, Privacy, PCPID, and PAURI Headers on the Cisco Unified Border Element

                  12.4(22)YB 15.0(1)M

                  This feature enables Cisco UBE platforms to support:

                  • P-Preferred Identity (PPID), P-Asserted Identity (PAID), Privacy, P-Called Party Identity (PCPID), in INVITE messages
                  • Translation of PAID headers to PPID headers and vice versa
                  • Translation of From: or RPID headers to PAID or PPID headers and vice versa
                  • Configuration and/or pass through of privacy header values
                  • PCPID header to route INVITE messages
                  • Multiple PAURI headers in the response messages (200 OK) it receives to REGISTER messages
                  • P-Preferred Identity and P-Asserted Identity Headers

                  The following commands were introduced: call-route p-called-party-id, privacy-policy, random-contact, random-request-uri validate, voice-class sip call-route p-called-party-id, voice-class sip privacy-policy, voice-class sip random-contact, and voice-class sip random-request-uri validate.

                  Feature History Table entry for the Cisco Unified Border Element (Enterprise) .

                  Table 3 Feature Information for PAID, PPID, Privacy, PCPID, and PAURI Headers on the Cisco UBE

                  Feature Name

                  Releases

                  Feature Information

                  PAID, PPID, Privacy, PCPID, and PAURI Headers on the Cisco Unified Border Element

                  Cisco IOS XE Release 3.1S

                  This feature enables Cisco UBE platforms to support:

                  • P-Preferred Identity (PPID), P-Asserted Identity (PAID), Privacy, P-Called Party Identity (PCPID), in INVITE messages
                  • Translation of PAID headers to PPID headers and vice versa
                  • Translation of From: or RPID headers to PAID or PPID headers and vice versa
                  • Configuration and/or pass through of privacy header values
                  • PCPID header to route INVITE messages
                  • Multiple PAURI headers in the response messages (200 OK) it receives to REGISTER messages
                  • P-Preferred Identity and P-Asserted Identity Headers

                  The following commands were introduced: call-route p-called-party-id, privacy-policy, random-contact, random-request-uri validate, voice-class sip call-route p-called-party-id, voice-class sip privacy-policy, voice-class sip random-contact, and voice-class sip random-request-uri validate.