I have a very strange issue. I have and OPT 61C RLS 4 on one end and a OPT 11C RLS 3 on the other. We are using the CISCO 2811 to route calls both ways over the customers network. For some reason, if I call from the OPT 11 thru the CISCO'S and out the OTP 61 one call leaves the 11 and 2 calls are placed out the 61. Any ideas ????