All, Thanks a ton for the feedback! We didn't have boots on the ground so visibility was difficult. I really appreciate the responses. It was a 904 on the T1 0/2 interface. A straight ethernet worked just fine. It turns out that there were two issues. 1) There was a cable crimping issue (I know, right) 2) The PBX was configured as a fractional T1 (16 channels) and we had the 904 configured for the full 24 channels. Again. Thanks to everyone! On Fri, Oct 31, 2014 at 2:18 PM, Jay Hennigan <jay at west.net> wrote:
On 10/31/14, 6:17 AM, David Wessell wrote:
So two different answers :)
It's a 904 connecting on the t1 0/2 DSX interface.
The main issue is that we keep getting D channel is DOWN.
If the T1 interface itself is up, the cable is correct.
The 904 has two T1 interfaces and only T1 0/2 can be used for PRI. When connecting this to a PBX, a straight-through cable is most common.
Any of the "e" series TA900 flavors have four T1 interfaces. T1 0/3 and/or T1 0/4 can be used for PRI, and these will generally need a T1 crossover (1,2 swapped with 5,4) to go to a PBX.
If the T1 is up but the D-channel is down, it isn't the cable. Check timing source, switch type, that the PBX uses channel 24 for D-channel, user vs. network role configuration, etc.
-- Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
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