atcomsystems.ca/forum Forums TDM Business Telephone Systems Panasonic Telephones & Systems One-way audio Tda200

Installed a DHLC8 card on a tda200. Enabled XDP.

All ports, analog and digital straight at the block, can hear the person on the other end of a CO call but they cannot be heard. This is only happening on CO calls, intercom calls are fine.

Put card out of service and back in service, power cycled system, moved the card to a different slot and still the problem. Called tech support and determined it was most likely a bad card.

Took the card back to the shop, slapped it in a tda100 and the card works fine.

Any ideas? The card is a version 5 and the tda200 is a version 2. The only thing I haven't tried is a new amphenol cable and block but I don't see how that would cause it.

is there a pri on this system are you saying that you don't get sidetone ?(you don't hear yourself in the earpiece?)

I've had similar problems with one-way audio, but usually only on one port. After trying the usual, reset the phone, swap phones with working sets, taking the port OUS, all the things you have tried, if I move the phone to a different port it works fine. If I go back later and connect a phone to the suspect port, it works fine.....This has happened on TDA 50 thru TDA 200. It seems my issue is usually the receptionists phone which gets the most use, incoming. I actually had an auto dealership where the problem occurred at the receptionist phone which was always incoming. Once I initiated a call from the phone, it started working again...
I've talked to tech support about this and I get the usual, bad phone or bad port... I've not had this happen on any TDA's that are the newest version, whether that means anything. This almost reminds me of the old days of the TD1232 V3 P231M that had the one way audio issue that was fixed with P231UA. Something else I've had cards that weren't working that I replaced and when I brought them back to the shop they worked fine. Repair told me that sometimes they need to be reseated?
Did you have any errors in the elog?

No PRI, pots lines. The caller can't hear me but I can hear the caller.

IcTelco, there were no errors in the log, and I did reseat the card, even move it to a different slot. I'm gonna call tech support again and hopefully get someone different.

Not clear to me which card you moved /removed but did you try a known good trunk card?

All ports on the DHLC8 card have one way audio. That's the card I moved around, took out of service etc...

Pan tech support told me to default the system, see if the card works on that system defaulted, then upload the backup file.

heck if you going to dump it why not upgrade it and
convert the backup to a 5.021 makes no sense not to if you are dumping it anyway....

Yeah might do that, depends how much time customer is willing to be down.

Turned out they had two bad slots, the only two that I initially tried. Never seen that on a Panasonic. Luckily they had three more unused slots.

Before I found that out I intialized the system and upgraded to a v5, but that didn't change anything.

What do you suppose caused the slots to go bad? When you originally installed and moved the DHLC8, did you insert them with the power on to the cabinet? The other thing I'd be curious about is if another type of card would work in that slot. I've had times when swapping out a DLC16 or DHLC8 that had a fuse problem, it would garbage the data on the system.