We have two a few analog gateway VG 310 and VG 400. We want to know if these gateway can be configured to use with ISDN phone/lines. We are able to register these gateways to CUCM 12.5 and working fine with analog lines. Now, we want to test if they works for the ISDN phones. When we plugged the phones to the port, there is no dial tone, no power at all.
Appreciate any helps in advanced
