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

[Ryan Huff]

Thanks for calling me on that Nate; I glossed over the part about the B2B PRI. The clock source internal command is only applicable with the channel-group command (pri-group for data).

I just switched my clock source to internal (using channel-group) and the syntax was accepted. I'm not able fully replicate a B2B so I can't establish L2 or L3 but I suspect it would work.

http://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/software/configuration/guide/ConfT1E1NIM.html


Specifies the clock source. The options are as follows:

  *   internal-Sets the controller framer as the clock master.

The clock source internal command is only applicable with the channel-group command and the pri-group (for data) command.

Note The pri-group command is supported on the NIM-xCE1T1-PRI for data without the keyword voice-dsp.

  *   line-Specifies the phase-locked loop (PLL) on a port. When both a primary port and a secondary port are configured and the primary port fails, the PLL switches over to the secondary. When the PLL on the primary port becomes active again, the PLL automatically switches to the primary port.
  *   network-Sets the controller to sync to the TDMSW clock for both TDM voice and data support. This configures the far end of the T1/E1 line as the clock line.

Default is line.



Sent from my iPad

On Oct 27, 2015, at 9:48 PM, Brian V <bvanbens at gmail.com<mailto:bvanbens at gmail.com>> wrote:

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<mailto: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<mailto: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
!
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<mailto:cisco-voip-bounces at puck.nether.net>> on behalf of Brian V <bvanbens at gmail.com<mailto:bvanbens at gmail.com>>
Sent: Tuesday, October 27, 2015 8:42 PM
To: cisco-voip at puck.nether.net<mailto: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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