[cisco-voip] ISR 4431 - Need to configure "clock source internal" on PRI interface , get error

Brian V bvanbens at gmail.com
Tue Oct 27 21:46:28 EDT 2015


I've opened a TAC case on it.  I'll report back what I find out.

On Tue, Oct 27, 2015 at 8:43 PM, NateCCIE <nateccie at gmail.com> wrote:

> Ryan,
>
> This doc and sample config seems to only show how to do normal user side &
> network clocking.
>
> When doing network side isdn to a pbx, you have to provide them the clock,
> I like Brian have not figured out that part of the 4K voodoo.
>
> Sent from my iPhone
>
> On Oct 27, 2015, at 7:23 PM, Ryan Huff <ryanhuff at outlook.com> wrote:
>
> Brian,
>
> You'll essentially be doing the same thing as you would have in the ISRG2
> but as you've discovered, the syntax has changed a bit in the 4k's. I've
> included the relevant portion of a t1 config on a 4k in my lab below. Here
> is the link for 4th gen NIM t1 configurations (I'd suggest a good read
> here, a lot of syntax has changed that might leave you scratching your
> head):
> http://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/software/configuration/guide/ConfT1E1NIM.html
>
>
>
> Hope This Helps,
>
>
> Ryan
>
>
> |----- CONFIG SAMPLE -----|
>
>
>
> *card type t1 0 2 !*
>
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> *isdn switch-type primary-ni ! network-clock synchronization automatic
> network-clock synchronization participate 0/2 ! voice-card 0/2 dsp services
> dspfarm ! controller T1 0/2/0 framing esf linecode b8zs ! clock source line
> primary network-clock input-source 1 controller t1 0/2/0 cablelength long
> 0db pri-group timeslots 1-24 voice-dsp ! interface Serial0/2/0:23
> encapsulation hdlc isdn switch-type primary-ni no cdp enable *
>
>
>
> * ! |----- CONFIG SAMPLE -----| *
>
> ------------------------------
> *From:* cisco-voip <cisco-voip-bounces at puck.nether.net> on behalf of
> Brian V <bvanbens at gmail.com>
> *Sent:* Tuesday, October 27, 2015 8:42 PM
> *To:* cisco-voip at puck.nether.net
> *Subject:* [cisco-voip] ISR 4431 - Need to configure "clock source
> internal" on PRI interface , get error
>
>
> I have a ISR 4331 that I'm configuring for voice PRI support.
>
> Performing an integration with a Nortel PBX (back to back PRI) where i
> need to be the clock source on the underlying T1 circuit.
>
>
>
> In the past on ISR G2 platforms (like a 2921),  I could configure "clock
> source internal" under the controller T1 interface.  On the 4331 I get
> the following error when the clock source it set to internal under the
> controller T1
>
>
>
> TIV-4331-01-TEMP(config-controller)#pri-group timeslots 1-24
>
> %Cannot create ds0/tdm/pri-group with clock source internal
>
> %pri-group voice-dsp cannot be created under the clock source configuration
>
>
>
> How do I accomplish the same on this newer platform or is it no longer
> possible ?
>
>
> The NIM does have it's own DSP resources.
>
> I can get the integration up and working, with the default "clock source
> line",  but I  get slips on the t1 as the Nortel side is free running  and
> looking to the line as a clock source on its end.
>
>
> I hope I'm just missing something obvious.
>
> Thanks
>
>
>
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>
>
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