Refer to the exhibit. In an effort to troubleshoot a caller ID delivery problem, a customer emailed you the voice port configuration on a Cisco IOS router. Which type of voice port is it?

Configuring FXS and FXO Voice Ports to Support Caller ID
To configure caller-ID on FXS and FXO voice ports, use the following commands beginning in global configuration mode:Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_2/voice/configuration/guide/fvvfax_c/vvfclid.html