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<p style="margin:0in;font-family:Calibri;font-size:11pt">I have a ISR 4331
that I'm configuring for voice PRI support.</p>

<p style="margin:0in;font-family:Calibri;font-size:11pt">Performing an
integration with a Nortel PBX (back to back PRI) where i need to be the clock
source on the underlying T1 circuit.</p>

<p style="margin:0in;font-family:Calibri;font-size:11pt"> </p>

<p style="margin:0in;font-family:Calibri;font-size:11pt">In the past on ISR
G2 platforms (like a 2921),  I could configure "clock source internal"
under the controller T1 interface.<span style="mso-spacerun:yes">  </span>On
the 4331 I get the following error when the clock source it set to internal under the controller T1<br></p>

<p style="margin:0in;font-family:Calibri;font-size:11pt"> </p>

<p style="margin:0in;font-family:Calibri;font-size:11pt">TIV-4331-01-TEMP(config-controller)#pri-group
timeslots 1-24<span style="mso-spacerun:yes">             </span></p>

<p style="margin:0in;font-size:11pt"><span style="font-family:monospace,monospace">%Cannot create
ds0/tdm/pri-group with clock source internal</span></p><span style="font-family:monospace,monospace">

</span><p style="margin:0in;font-size:11pt"><span style="font-family:monospace,monospace">%pri-group voice-dsp
cannot be created under the clock source configuration</span></p>

<p style="margin:0in;font-family:Calibri;font-size:11pt"> </p>

<p style="margin:0in;font-family:Calibri;font-size:11pt">How do I accomplish
the same on this newer platform or is it no longer possible ?</p><p style="margin:0in;font-family:Calibri;font-size:11pt"><br></p><p style="margin:0in;font-family:Calibri;font-size:11pt">The NIM does have it's own DSP resources.</p><p style="margin:0in;font-family:Calibri;font-size:11pt">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.</p><p style="margin:0in;font-family:Calibri;font-size:11pt"><br></p><p style="margin:0in;font-family:Calibri;font-size:11pt">I hope I'm just missing something obvious.</p><p style="margin:0in;font-family:Calibri;font-size:11pt">Thanks<br></p><p style="margin:0in;font-family:Calibri;font-size:11pt"><br></p><p style="margin:0in;font-family:Calibri;font-size:11pt"><br></p>

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