I’m Luis, Network Planning Manager of a long distance company in México (Avantel)
I would like to suggest you the following:
– Does the E1 (2 Mb) is R2orSS7?, If so, then you can split it up into two new trunk groups (this is not possible with PRI). – Size the first trunk group using the traffic you have during busy hour, convert to E0 using gos=0.01 or what ever you want.
– Trunk group for data: To apply GOS=.1 it should have a behaviour like voice traffic (modem calls) if not, you have to take care of the traffic it is (semiperment connection, simultaneous data sources, then erlang B or C is not applicable and a source to channel assigment could work)
I hope this brief explanation could help you. This is my email: firstname.lastname@example.org