Cross talk on Avaya Partner multiple Motorola adapters

Posts: 6 · New Forum Member Joined: Jul 03, 2006 Posts: 6

We have a Partner ACS system and when multiple adapters/Vonage lines are hooked to it, you can have a conversation on one line heard in the back ground of a completely different Vonage line on another phone/extension.

Vonage support changed some ports on the adapters but it happens ocross all lines in all directions.

Posts: 1715 · Posted: Mon Jul 03, 2006 11:26 am Post subject:

95% chance this is in your own wiring. Make sure you're using twisted pairs to do the connection between the Vonage adapter and your PBX.

A long-shot:
How close together are the Vonage adapters? Make sure you have at least 1-3" between them. I don't think this is the problem, but I throw it out as a possible solution.

Posts: 6 · New Forum Member Joined: Jul 03, 2006 Posts: 6

I'm using standard phone wiring, like what comes with a new phone. I do have them close to each other, I will try moving them apart, thanks.

Posts: 1715 · Posted: Tue Jul 04, 2006 1:46 am Post subject:

If "standard phone wiring" = the normal stuff you use to connect a phone to a wall jack, that's not twisted pair and is subject to interference and crosstalk.

The easiest way to avoid this would be to use Cat 5 wire, which is twisted pair.

Posts: 4777 · Vonage Forum **MVM** Joined: Aug 30, 2005 Posts: 4777

cccc wrote:

I'm using standard phone wiring, like what comes with a new phone. I do have them close to each other, I will try moving them apart, thanks.

Also try disconnecting from your house wiring and plugging a phone directly into each of the adapters. Initiate multiple calls and check for cross talk. If you still get it, it's a Vonage problem. If you don't, it's a problem with your terminal equipment/wiring.

Posts: 6 · New Forum Member Joined: Jul 03, 2006 Posts: 6

Still need some help on this one. I just changed out the connections from the adapters to the Partner ACS system with cat5 wiring and RJ11 jacks. I have also seperated the adapters by a good foot or more. I still have background conversations of one line, being heard on another.

Posts: 21

cccc wrote:

We have a Partner ACS system and when multiple adapters/Vonage lines are hooked to it, you can have a conversation on one line heard in the back ground of a completely different Vonage line on another phone/extension.

Vonage support changed some ports on the adapters but it happens ocross all lines in all directions.

Was your partner ACS phone system originally in use with copper phone lines from a phone company?
Was your Partner ACS phone system professionally installed with twisted pair wiring from the KSU to each of the system telephone stations or did you patch it in to existing house wiring?
Is the crosstalk loud or just barely detectable?

Quote:

I just changed out the connections from the adapters to the Partner ACS system with cat5 wiring and RJ11 jacks. I have also seperated the adapters by a good foot or more. I still have background conversations of one line, being heard on another.

Are you using one cat-5 cable with RJ11 plugs crimped on each twisted pair or are you using separate cat-5 cables for each line from each of the Vonage adapter's?
Are any of the cat-5 cables wire-tied to conduit and/or metal pipe of any kind?
Is the Partner KSU properly grounded?

Posts: 6 · New Forum Member Joined: Jul 03, 2006 Posts: 6

Thanks for chiming in. The Partner ACS was originally installed by the phone company, individual runs to each extension, no looped wiring at all. All twisted pair runs.

The cross talk is just distiguishable but enough you can sometimes hear it during a conversation, and when I test it, I can hear it as soon as I get rid of the dial tone (just pushing any number to start the dialing process).

I used a seperate Cat-5 for each connection, used the blue and orange pairs and just bent back thegreena nd brown pairs. The cables are not anywhere near any metal pipes/conduits and the KSU definately has a solid ground installed by the phone company during original installation.

Posts: 21 · Posted: Tue Jul 11, 2006 12:58 pm Post subject: Partner Crosstalk Issues

cccc wrote:

Thanks for chiming in. The Partner ACS was originally installed by the phone company, individual runs to each extension, no looped wiring at all. All twisted pair runs.

The cross talk is just distiguishable but enough you can sometimes hear it during a conversation, and when I test it, I can hear it as soon as I get rid of the dial tone (just pushing any number to start the dialing process).

I used a seperate Cat-5 for each connection, used the blue and orange pairs and just bent back thegreena nd brown pairs. The cables are not anywhere near any metal pipes/conduits and the KSU definately has a solid ground installed by the phone company during original installation.

Since crosstalk is generally caused by induction between closely located pairs carrying analog telephone traffic, you can try grounding all un-used pairs of the cable connecting your Vonage adapters to the KSU, on one end only.

Is the cable, connecting the telephone stations to the KSU, cat-3 or cat-5? Here in Illinois, SBC/AT&T commonly used cat-3 to cut costs and failed to ground all un-used pair, at one end as indicated in the installation manual, to save time.

Who is your ISP and what level of bandwidth do they provide?

Quote:

Also try disconnecting from your house wiring and plugging a phone directly into each of the adapters. Initiate multiple calls and check for cross talk. If you still get it, it's a Vonage problem. If you don't, it's a problem with your terminal equipment/wiring.

Did you try plugging separate phones directly into the Vonage adapters and test as steve48 had suggested ... if so, what were the results of your testing?

Posts: 350 · Vonage Forum Evangelist Joined: Dec 04, 2005 Posts: 350

I have two Partner units, one a Partner Endevour unit (a stripped down ACS R1 unit that was sold at a lower cost) and a Partner ACS R4 unit and I have been able to hear some light cross-talk in the background of both. FWIW, a Partner II system I worked with had really bad cross-talk between two of the local extention lines (so bad that calling one extention would ring on the other one).

Cross-talk is only going to come from the analog portion of your system. In other words, the analog portion of the phone adapter devices, wiring between the phone adapter(s) and PBX, or the PBX itself. If you're getting cross-talk between lines on different phone adapters, its not the phone adapters. For that matter, its not the internet connection either. Its your wiring or the PBX system. Try connecting individual single line phones using the same wiring that goes to the PBX system. If you hear cross talk, its the wiring. If you do not, its the PBX system.