R2511-HP MSR Router Series Voice Configuration Guide(V5)

98
Troubleshooting digital voice subscriber line
configuration
Failure of call connection from router to PSTN
Symptom
With R2 signaling adopted, the router cannot establish connection with the subscriber at the switch side.
Solution
Use the display current-configuration command to check that the trunking mode on the router matches
that on the switch. When the switch adopts outgoing trunking mode, the router must adopt incoming or
bidirectional trunking mode. When the switch adopts incoming trunking mode, the router must adopt
outgoing or bidirectional trunking mode. When the router adopts incoming trunking mode, it only
accepts incoming calls.