advise to differentiate from which dialup number customer is dialing in

[Milver S. Nisay]

is there any way from the packets i can differentiate from which E1 lines are the customers calling from?   my scenario is, i have 2 telcos, (Telco A and Telco B) providing 1 E1 line each going to my AS5300 router, is there any way i can know who is online from E1 Telco A and E1 Telco B, if there is, this would also allow me to do separate accounting and log process on individual clients from different E1s. hope i this the right way, anyone can advise an approach?   right now, what AS5300 command, freeradius and a simple script can show me is who is online on AS5300 router, regardless they dialed from E1 Telco A or E1 telco B. //milver