So I've got this partially figured out. It had to do with the compand-type. E1 was a-law and T1 was u-law. I set the E1 side for u-law and it sounds correct now.
The final thing I am trying to figure out is how to 'trans-compand' (if that is the correct term) on the PSTN gateway. As it sits I had to change the compand-type between the PSTN and E1 gateway. I don't have experience with foreign connectivity so maybe this is the way it is done in the real world but I am thinking that perhaps the E1 site may not want or be able to change their compand-type, so can it be changed at the PSTN level between a-law and u-law locations? Thanks, Jason From: Jason Granat Sent: Thursday, March 11, 2010 9:46 AM To: <ccie_voice@onlinestudylist.com> Subject: PSTN Call Distortion Between T1/E1 Perhaps this is something simple that I am overlooking but I have the generic setup running in my home lab with 3 gateways and one PSTN router. 2 of the gateways are T1 and one is E1. The PSTN router is also running CME with a 7960 to simulate PSTN destinations. Calls from any site to the PSTN phone are fine. Calls between T1 sites are fine. Calls between T1 and E1 sites are distorted, like the gain is way too high. I tried playing with the gain on the voice-port but no luck. I'm not finding much online or in Cisco docs. Any suggestions? Thanks, Jason ________________________________ http://slash128.com
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