1 Reply Latest reply on Feb 9, 2017 12:59 PM by jwable

    Multi-PRI sevice CPE with SIP Trunk for Network - Configuration assistance needed

    jkeegan123 New Member



      I have a TA908e that I need to configure to service a PBX with (2) PRI's.  I am able to configure this fairly easily, however when the first PRI fills up, I cannot get the 2nd PRI to service the PBX.


      I see both "D" channels come up on the PRI's that I have configured, so I know that things are at least partially correct .. what configurations need to be made to allow the PBX to be able to pull from the 2nd PRI when all of the "B" channels on PRI # 1 are full?


      - Do I create (1) ISDN group with (2) PRI's in it?

      - Do I create (2) ISDN groups each with (1) PRI in each?

      - Do I create (1) TDM group with (2) T1's in it?

      - Do I create (2) TDM groups with (1) T1 in each?


      The rest of the configuration is fairly straight forward ... as I said, this is working up until the PRI is full with all "B" channels allocated.


      - I have created the T1's with (1) TDM group

      - I have created the PRI interfaces with (1) ISDN group between them

      - I have created the ISDN voice trunk with "resource-selection linear ascending" and connected the single ISDN group consisting of (2) PRI's

      - I have created the SIP voice trunk and connected my SIP server to it without issue

      - I have created the PRI voice grouped-trunk and added the Voice trunk to it

      - I have created the SIP voice grouped-trunk and have all of my accepted phone #'s passing through it

      - I see all "D" channels up when I do "show interface PRI 1" and "show interface PRI 2"


      What am I doing wrong?  When the "B" channels are all full, my PBX reports "all circuits are busy".