[VoiceOps] T1 Crossover Cable

Fri Oct 31 11:02:57 EDT 2014

Hello,

For a TA9xx, you should use a straight T1 cable (standard Eth wiring will work).

For a TA9xxE, you will need a crossover T1 cable.

If the physical T1 is coming up but your PRI stays down, your wiring is likely correct and there’s a config mismatch. Adtrans always use channel 24 as the D-channel (regardless of the number of B-channels in use) so make sure the settings match on the phone system.

Regards,

Ken Mix

From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Faisal Imtiaz
Sent: Friday, October 31, 2014 7:51 AM
To: David Wessell
Cc: VoiceOps (voiceops at voiceops.org)
Subject: Re: [VoiceOps] T1 Crossover Cable

https://supportforums.adtran.com/thread/4027

suggests that the cable should be a T1 x-over cable, please note that T1 x-over is not the same wiring as Ethernet x-over cable.

You can easily make a loopback cable/plug to test each side if needed. (just google for t1 loopback wiring).

Regards

Faisal Imtiaz
Snappy Internet & Telecom
7266 SW 48 Street
Miami, FL 33155
Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: Support at Snappytelecom.net<mailto:Support at Snappytelecom.net>

________________________________
From: "David Wessell" <david at ringfree.biz<mailto:david at ringfree.biz>>
To: "Fred Posner" <fred at palner.com<mailto:fred at palner.com>>
Cc: "VoiceOps (voiceops at voiceops.org<mailto:voiceops at voiceops.org>)" <voiceops at voiceops.org<mailto:voiceops at voiceops.org>>
Sent: Friday, October 31, 2014 9:17:02 AM
Subject: Re: [VoiceOps] T1 Crossover Cable

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.

I've run through every step in the Adtran troubleshooting guide (https://supportforums.adtran.com/servlet/JiveServlet/previewBody/4521-102-2-4862/PRI%20Troubleshooting.pdf) and still get the message. We've matched all setings on the Shoretel side with those in the Adtran..

And I do have a ticket in with Adtran. But they take forever to call back :)

It does appear that when they connect the the Adtran 904 for the Shoretel via a crossover cable the PRI interface itself stays down. A straight  ethernet and the connection does come up. But the D Channel remains down.

Thanks
David

On Fri, Oct 31, 2014 at 9:08 AM, Fred Posner <fred at palner.com<mailto:fred at palner.com>> wrote:

If you are connecting it directly, then generally yes... a crossover. If there's anything in-between the two, then generally the answer is no.

Fred Posner
The Palner Group, Inc.
http://www.palner.com (web)
+1-503-914-0999<tel:%2B1-503-914-0999> (direct)
+1-954-472-2896<tel:%2B1-954-472-2896> (fax)

On 10/31/2014 09:04 AM, David Wessell wrote:

I'm connecting a Adtran 904 to a Shoretel system for a voice only PRI.

Am I correct that a cross-over cable is needed and not a straight thru
cable? The IT vendor and I are having a small disagreement.

Thanks
David

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