What is the status of PSTN connectivity from this gateway?

On the PSTN gateway, a network engineer runs sh isdn status and finds the Layer 2 state of each interface to be "TEI_ASSIGNED".

What is the status of PSTN connectivity from this gateway?
A . The T1 interfaces are established and operational.
B . This information does not indicate the status of PSTN connectivity from the gateway.
C . The T1 interfaces are down.
D . The T1 interfaces are being tested by the carrier.

View Answer

Answer: C