Sorry for my mistake. I'm using asterisk digium E1 card, DAHDI channel. I've two server with 30 E1 total. Each server contains 15 E1, 479 channels. Telco distributing call traffic 50-50 in each server. From
cdr table I can see 298972 calls generated with more than 6 seconds and 409237 calls are less than 6 seconds in a day. As per
cdr log, call disconnection ratio is very high.