9 Replies Latest reply on Feb 26, 2015 11:24 AM by dmac

    T1 to SIP conversion

    luke_shelton New Member

      We are planning on converting one of our PRI customers to SIP using a TA908 and would like to know if my plan will work.  The customer's PBX can only accept a PRI otherwise we would use SIP all the way to their PBX.

       

      Below is our current setup:

       

      Metaswitch  ->  PRI at CPE  ->  Cisco PBX  ->  IP Phones

       


      Here is what we want to do:

       

      Metaswitch  ->  SIP Into TA908  ->  PRI Out to CPE  ->  Cisco PBX  ->  IP Phones

       

      We basically are taking the TA and handing off the PRI from there instead of the Metaswitch doing it.  Do we build the voice users on the TA908, even though the IP phones will continue to register with the Cisco PBX?  The reason we don't take full control of all equipment is because they have a managed services company managing their phones, we only provide the PRI.

        • Re: T1 to SIP conversion
          burgermeister Employee

          Luke,

           

          Nope, in a typical SIP-to-PRI configuration (SIP from Meta and PRI to CPE) you will not configure voice user accounts at all.  See link to sample configuration below:

           

          Total Access 9XXe - SIP to PRI sample configuration

            • Re: T1 to SIP conversion
              luke_shelton New Member

              We are testing this in the lab and having some issues getting it working.

               

              Here is our lab setup:

               

              Meta  ->  TA924 (SIP in, PRI out)  ->  TA908 (PRI In)  ->  POTS

               

              We can see the call hit the first TA, but it doesn't seem to be exiting the first TA.  I'm sure it has something to do with our config.

                • Re: T1 to SIP conversion
                  burgermeister Employee

                  Luke,

                   

                  Is the T1 connection between the TA 924 and 908e in an "UP" state, (via the "show interface t1 0/x") CLI command?  If so, is the PRI D-channel between the TA 924 and 908e in an "UP" state (via the "show interface pri x" ) command?  Lastly, verify the PRI interface of the TA 924 is configured as "Network Role" and the PRI Interface of the TA 908e is configured as "User Role".

                   

                  -Craig

                    • Re: T1 to SIP conversion
                      luke_shelton New Member

                      Yes to all those questions.

                        • Re: T1 to SIP conversion
                          aaron_integra New Member

                          And you have a voice grouped-trunk set up for both of your voice trunks?  Also, it would be easier to diagnose any config issues if you could provide a sample of the 924 config, minus any private information.

                           

                          voice grouped-trunk PRI

                            trunk T02

                            accept $

                          !

                          voice grouped-trunk SIP

                            trunk T01

                            accept $

                            • Re: T1 to SIP conversion
                              nbeacham New Member

                              Below is the full voice config for the TA924. Also note, that calls are traversing to the 908 over the PRI, so I think we are set up correctly on that front.
                              I'm just not sure how to configure the 908 to test it.

                               

                              We have a SIP Binding on the metaswitch that the PBX uses. The 924 is set up for SIP to PRI conversion and hands off to the 908. I'd like to test it, but all I get is busy either way. I'm sure if I had a PBX to hand off to it would be easier, but I don't have one readily available.

                               

                              NG-TA924-LAB#show run voice

                              Building configuration...

                              !

                              !

                              voice feature-mode network

                              voice flashhook mode transparent

                              voice forward-mode network

                              voice conferencing-mode local

                              !

                              !

                              !

                              !

                              !

                              !

                              !

                              !

                              voice dial-plan 1 local NXX-XXXX

                              voice dial-plan 2 local 515-NXX-XXXX

                              voice dial-plan 3 long-distance 1-NXX-NXX-XXXX

                              voice dial-plan 4 toll-free 1-800-NXX-XXXX

                              voice dial-plan 5 toll-free 1-888-NXX-XXXX

                              voice dial-plan 6 toll-free 1-877-NXX-XXXX

                              voice dial-plan 7 toll-free 1-866-NXX-XXXX

                              voice dial-plan 8 international 011-$

                              voice dial-plan 9 specify-carrier 411

                              !

                              !

                              !

                              !

                              !

                              !

                              voice trunk T01 type sip

                                sip-server primary x.x.x.x

                              !

                              voice trunk T10 type sip

                                description "SIP-PBX"

                                match ani "$" add p-asserted-identity "515369xxxx"

                                sip-server primary x.x.x.x

                                max-number-calls 23

                                register 5153xxxxxx auth-name "5153xxxxxx" password encrypted "262cb11554b83d99b9db1a04ce18e9162d35"

                              !

                              voice trunk T11 type isdn

                                description "ISDN-PRI"

                                resource-selection circular descending

                                connect isdn-group 1

                                early-cut-through

                                rtp delay-mode adaptive

                              !

                              !

                              voice grouped-trunk ISDN

                                trunk T11

                                accept $ cost 0

                              !

                              !

                              voice grouped-trunk SIP

                                trunk T10

                                accept $ cost 0

                              !

                              !

                              !

                              !

                              !

                              !

                              !

                              !

                              !

                              !

                              end