sundance-communications.com/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems Puzzling issue with Legend

I have an Lucent Legend II system, 4 408 gs/ls/mlx cards and a VM R3 card. The switch is behind a Cisco T1 router with analog breakout. Two months ago on several occasions per day, a picked up call will let the answerer hear the caller but the other party cannot hear them. This has happened many times in one day. It stopped altogether for about a month, then started again this last week.

Now here is the puzzle, today we switched them from Telepacific to Cbeyond. Whole new circuit, CO to customer. Whole new router.

Now this exact thing happened 4 years ago. We replaced phones, CPU and 408 cards and it did not help. One day Verizon was doing some work on the street and a guy comes in and asks if the phones were OK because they just replaced a circuit card in the street box. All was well for years. At that time they were on a T1 from Allegiance Telecom. We had tried running new cable from the MPOE to the phone room and that did not help.

What could this be? Could this new circuit be on the same card (not sure what the card is or does). Getting Verizon to look at it is next to impossible unless they can replicate an error at their side.

Years ago swapping the CPU and power supply and 408 card did not fix anything.

Sounds like it's not a new circuit. It's the same one provided by Verizon and just supplied by a different CLEC. Why would they change it?

-Hal

If this is Flex or Dinamic T1 then it is Cisco Router problem and Flex. We had the same problem of loosing one way Audion with Broadview. Changed to full T1 - problem disappeared.

CBeyond provides a VOIP service over FR and the T1 is not channelized. It is all packetized traffic breaking out to the FX0s on the router. So one would not expect a one way audio issue, but rather everything would be dead. You would expect the usual VOIP trouble similar to a bad cell phone connection.

I am going to verify LS on the lines. How about the telephone sets themselves? The link to the phones from the switch I take is a GS circuit? Could the GS not be establishing a two-way? If so how to fix that?

CBeyond tech said he can change the voltage balance from his end if I can tell him what to change. That much is over my head.

GS doesn't effect on two way audio compare to LS. This trouble mostly comes from provider otherwise it is a Processor card issue on the switch.

In the first part of this post you state:

"The switch is behind a Cisco T1 router with analog breakout."

So, am I correct in assuming the service is ANALOG that plugs into the Legend?

If so, what happens when you make/receive test calls right at the CISCO?

That would be where I would test it.

Remember, when you troubleshoot something, you are looking for FAILURE, not the cause of the failure.

Once you find the failure, you can start to determine the cause.

See it fail, then isolate to the failing component.

The service is analog from the router, yes. This problem seems to happen when calls are originated from the other party. Hanging a butt set off the block and dialing all day long is not an option. If I can replicate this problem and exclude the switch I would have some ammo. But I have no way I can think of to do this other than hanging an SLT off a line and dialing it all day long with somebody answering at the other end. And some days the customer reports no issues.

OK, reality check needed. I called in to the office, heard the AA pick up, dialed the extension and when she answered I heard silence. She could hear me, though. But I had heard the AA just before. SO to me it really seems there is a problem with the connection between the switch and the telephone. We've switched out phones BTW and its no better. Last night I swapped the 408 card.

Would it be worth replacing the CPU module? Curently I have an A3 PS and a R7 v11.0 CPU.

I think we need to look at this a different way.

How many folks at the CALLED location can not be heard?

Is it JUST the operator, or have more people had this problem?

Have you ever been on site to see it fail?

I have some ideas, but they are not necessarily hardware related.

Some maybe HW related, but I think we need a bit more info if you have it.

It's almost always the caller who can hear the operator but not the other way around. It affects all extensions. I had it happen to me, just today. I head the AA, then transferred to ext 10, she picked up and I could hear only silence but she heard me cussing like a truck driver.

Anyway, update: this customer signed on for a new Partner ACS R8 today and 8 refurb phones. We're just going to junk the Legend.