Fractional PRI config

svo4dot6

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.

pitviper

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

svo4dot6

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