You should ask the Telco for ISDN settings.
in Europe different
Go to:
config
line 1 2
link is E1
Law is A-law (U-law for North America and Japan – T1, A-law for Europe, Middle East and Asia -> E1)
Line coding is usually HDB3 for E1
e1 framing is usually SF.
This is L1 settings. If you want to see if the settings are OK, look at your alarms.
For ISDN -> for E1 (Europe, Asia, Middle East) signalling is mostly ETSI. if not – then QSIG.
D-channel is 16