Trunk to Trunk Transfering Screeching Sound?

[bheaney]

Hello,
A customer has a 6.1 (12) with analog trunks on an expansion module that is requiring external forwarding. However, when transfering to the user through vm pro with unconditional forwarding set to on, a very loud screeching sound is made when the second trunk is seized to dial out. The sound is also heard by the person recieving the call.
I have accomplished this before with other systems that were of a 5.0 (18) release and besides the release difference or telco carrier, the only thing I can think to be the difference is that the other systems were doing this with analog trunks within the base control unit and not on an expansion module.
I have mirrored the settings to match the successful systems with no change. Any Ideas??
Thanks in advance

 

[hairlessupportmonkey]

does it occur after a reboot of the VM server or the IPO?



ACSS - SME

 

[bheaney]

HSM,
I have only rebooted the IPO several times. I did not think the problem was related to the VM PC. I can reboot now and let you know. Thanks

 

[bheaney]

The problem continues even after a reboot of the IPO and the VM Pro server. Very Strange.

 

[mforrence]

Do you get the same screech when making a regular conference call? There were some 412 control units with bad conference chips that had issues. If you manually transfer a call off-site, do you get the same result?
Mike

 

[hairlessupportmonkey]

indeed. I suspect a possible hardware fault.

you could try and also just re-run the BIN files over it again as well.

ACSS - SME

 

[Westi]

Had that happen on a IP500V2 not too long ago and solved it with resistors in the analog lines to dull the lines down a bit (they had about 45mA when off hook) and then re-run the impedance matching tool.
I used two 660 Ohm resistors per line but you can use anything really as long as you put in the same value on tip and ring.

Joe W.

16082

 

[aroldan]

I've ran into this same issue recently. I'm gonna give Westi's suggestion a shot...

 

[bheaney]

Thanks all for the help. I'll be on site next week and try the resistors. I'll keep you posted on the result. Thanks Agian!