Anyone using 5ess with success? I have a customer that wants to use it. Seems to WORK for a short time then there are errors on the D-channel and their side (nortel switch) shuts down the channel. They were saying something about a slip error. I dont know this term. I am using dahdi 2.1.0.4 and asterisk 1.4.22 and libpri 1.4.7 Any ideas? jerry