Asterisk PBX troubles

[telnettech]

Does anybody use an asterisk IP PBX in an office that receives calls from an overseas call center....We are having trouble with voice quality when calls are transferred from the call center to our test office. When you call the asterisk pbx directly the quality is much better. The overseas office has a Avaya Definity G3 with an ISDN PRI for the calls to be routed back to US by way of the PSTN. The Asterisk IP PBX is using a ISDN PRI for incoming calls. The calls are originating here in the US and are being call forwarded in the LEC Central Office to the offshore office. They answer the calls overseas and take care of any scheduling or other minor office work. But if the caller needs other things or cant be helped by the call center staff, then the call center reps transfer to a DID number that rings a station in the Asterisk IP PBX. The voice quality seems to come and go and at times, it is hard to hear the calling party. In the small office that we are using for this test, we have all 8 SIP phones, that are polycom 501 models, plugged into the same switch. The Desktop PC's are also plugged into the phones for network connectivity....the Asterisk IP PBX is a new product for us that we are researching for possible deployment to future customers......any help will be appreciated

To error is human.....if the machine doesnt work, then KICK IT !!!!!!!!!!!!!

 

[telnettech]

found the trouble.....it was on the telco proividers codec....they had the wrong codec on the PRI between the office and the overseas call center

To error is human.....if the machine doesnt work, then KICK IT !!!!!!!!!!!!!

 

[isaacman]

I see that your using asterisk great system. I have a couple of questions. I running asterisk and definity Gs3i. I have asterisk picking up the dial tone from definity. I have a ISDN card from definity to a T1 card at asterisk.
I was wondering about using the agent id feature at the asterisk side. Do you use that feature?