CO Lines from Cable providers

[tecphonelady]

Right now we have 2 different customers, using 2 different cable providers for their CO lines having all sorts of issues. Both are IP500 w/ ATM4 cards.


The TimesWarner cable customer has occasional 1 way transmission. Rebooting IP500 and TW 'box' solves the issue temporarily. (This IP500 is running 5.0(15), to be upgraded tomorrow)

The other customer is dropping transfered, held and parked external calls intermittently. Internal calls are fine. (this IP500 is running 5.0(18)

Is anyone else seeing similar problems?

Thanks!



Ann

http://www.PhoneLady.com

and

http://www.TelecomEx.com

 

[Ragnorak]

You can try the Automatic Balance Impedance Match on the Analogue options tab of the lines. In my experience most of those issues turn out to be the cable provider having some problem. I've seen several bad cable modems cause issues.

 

[kwing112000]

we have had tons of issues with Cable providers stuff. Especially if using IP phones.

Kevin Wing
ACSS Small and Medium Enterprise (SME) Communications
ACS- Implement IP Office
ACA- Implement IP Office
Carousel Industries

 

[tecphonelady]

Ragnorak, we've tried the Impedance match without success.

Kevin, both our customer are using digital phones and very simple configurations. How have you been resolving the issues you see?

Ann

http://www.PhoneLady.com

and

http://www.TelecomEx.com

 

[kwing112000]

I have a pretty good doc i was given by one of the engineers at avaya and it shows what the ideal settings are for the analog trunk coming out of a CO or Channel bank. usually we can find something wrong and try to get the provider to fix the trunks. other times it is hit or miss on what fixes it. i will try and paste the line stuff here in the am

Kevin Wing
ACSS Small and Medium Enterprise (SME) Communications
ACS- Implement IP Office
ACA- Implement IP Office
Carousel Industries

 

[Ragnorak]

To be certain for the one way transmission you really need to be on site. (or you could wire jacks to the analog trunks and plug analog phones into the lines.) When the customer gets a one way transmission, identify the co line and pick up the analog phone connected to that line. If there is one way transmission on the analog phone you've proved the issue to the provider.

The disconnects are a bit harder. You can set SSA to start logging and see if you can get any information as to why it disconnects (you'll probably only get whether the IPO thinks it or the far end disconnected) This isn't dogmatic proof but it certainly is a starting point and ammo to get the carrier involved.

The biggest part of these things is just to let the customer know its hard to diagnose and that you're doing something about it. SSA can replay the logs and it is visual. Show the customer what the disconnect looks like if it seems to be a carrier issue. Other than that you could swap out the analog trunk card to see if it helps.

 

[DavidCT]

tecphonelady,

What brand of cable modem are the analog lines on? I used to see a lot of problems with Motorola Modems and Panasonic Phone Systems.

I have seen lots of IPO's with both Motorola and Scientific Atlanta modems with no problems.

You may just want to some-how convince the cable provider to swap out the modem for a different brand.