Hello, I've got this problem and maybe somebody has had the same, here are the details:
E1 card= Digium TE122PF
Dahdi Version =2.4.0
E1 Settings given by claro:
cable= straight (we tested a crossover as well just in case)
Framing/Coding= CCS/hdb3 and CRC4 (claro says they need CRC4)
PRI_CPE on our side
Clock/Sync on their side (1)
So far all we've gotten is RED alarm, never a green alarm.
1- using straight and crossover (1-4 and 2-5) cables (provider says it should be straight)
2- card is good since we switched to a new one and still the same
3- provider (Claro) tests the connection and with their testers it works fine
4- changing framing to non crc4, clock in 0 or 1, isdn2 (just in case) and nothing still
5- we put the loopback with a straight cable and alarm goes green (OK)
Please, if anybody has had any experience with E1s in Guatemala (claro) let me know if you can.