Fractional PRI config

svo4dot6svo4dot6 Member Posts: 35 ■■□□□□□□□□
So I'm working on converting over from using analog lines to a Fractional PRI and can't seem to get the configuration right. I have channels 1-10 available to me over the PRI, but my UC520 is only letting me pass calls on channel 23. DISCLAIMER: I have a very small amount of voice knowledge...I configured the UC520 to support 8 analog lines, but my only experience is with just playing on this one box.

Here are the important bits from the config:
isdn switch-type primary-ni

voice-card 0
 no dspfarm
 dsp services dspfarm





controller T1 0/2/0
 framing esf
 linecode b8zs
 pri-group timeslots 1-24

interface Serial0/2/0:23
 no ip address
 encapsulation hdlc
 isdn switch-type primary-ni
 isdn incoming-voice voice
 no cdp enable



voice-port 0/2/0:23
 connection plar 190

dial-peer voice 59 pots
 destination-pattern 9T
 direct-inward-dial
 port 0/2/0:23
 no sip-register


I'm sure I'm missing something, but I cant seem to figure it out. Any help would be greatly appreciated.

Comments

  • pitviperpitviper CCNP:Collaboration, CCNP:R&S, CCNA:S, CCNA:V, CCNA, CCENT Member Posts: 1,376 ■■■■■■■□□□
    23 is your d-channel – I don’t think that you can change this (even on a fractional PRI).

    You’ll want to replace the "full" PRI timeslots config with the following:

    controller T1 0/2/0
    pri-group timeslots 1-10

    (you may have to do a "shut" on voice-port 0/2/0:23 prior to removing the existing channel config).

    Also be sure to add an inbound dial-peer:

    dial-peer voice 100 pots
    incoming called-number .
    direct-inward-dial
    port 0/2/0:23
    CCNP:Collaboration, CCNP:R&S, CCNA:S, CCNA:V, CCNA, CCENT
  • svo4dot6svo4dot6 Member Posts: 35 ■■□□□□□□□□
    Thanks pitviper, that seems to have worked. After running:

    voice-port 0/2/0:23
    shut
    controller t1 0/2/0
    shut
    no pri-group timeslots 1-24
    pri-group timeslots 1-10

    and running no shut on both... a show run | sec controller gives me
    UC520#sh run | sec controller
    controller T1 0/2/0
    framing esf
    linecode b8zs
    pri-group timeslots 1-10,24

    However, my calls are showing taht they are using the right B-channels now:
    UC520#sho isdn status | i B-chan
    CCB:callid=8007, sapi=0, ces=0, B-chan=10, calltype=VOICE

    Thanks for helping out a n00b :)
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