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?
A.
FXS
B.
E&M
C.
BRI
D.
FXO
E.
DID
Explanation:
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:
Command Purpose
Step 1 Router(config)# caller-id
enable
Enables caller ID. This command applies to
FXS voice ports that send caller-ID
information and to FXO ports that receive it.
By default caller ID is disabled.
Note If the station-idor acaller-id
alertingcommand is configured on the voice
port, these automatically enable caller ID,
and thecaller-id enable command is not
necessary.
Step 2 Router(config-voiceport)#
station-id namename
Configures the station name on FXS voice
ports connected to user telephone sets. This
sets the caller-ID information for on-net calls
originated by the FXS port. You can also
configure the station name on an FXO port
of a router for which incoming Caller ID from
the PSTN subscriber line is expected. In this
case, if no caller-ID information is included
on the incoming PSTN call, the call recipient
receives the information configured on the
FXO port instead. If the PSTN subscriber line
does provide caller-ID information, this
information is used and the configured
station name is ignored.
The nameargument is a character string of 1
to 15 characters identifying the station.
Note This command applies only to caller-ID
calls, not Automatic Number Identification
(ANI) calls. ANI supplies calling number
identification only.
Step3 Router(config-voiceport)#
station-id numbernumber
Configure the station number on FXS voice
ports connected to user telephone sets. This
sets the caller-ID information for on-net calls
originated by the FXS port.You can also configure the station number
on an FXO port of a router for which
incoming caller ID from the PSTN subscriber
line is expected. In this case, if no caller-ID
information is included on the incoming
PSTN call, the call recipient receives the
information configured on the FXO port
instead. If the PSTN subscriber line does
provide caller-ID information, this
information is used and the configured
station name is ignored.
If the caller-ID station number is not
provided by either the incoming PSTN caller
ID or by the station number configuration,
the calling number included with the on-net
routed call is determined by Cisco IOS
software by using a reverse dial-peer search.
In this case, the number is obtained by
searching for a POTS dial-peer that refers to
the voice-port and the destination-pattern
number from that dial-peer is used.
Numberis a string of 1 to 15 characters
identifying the station telephone or
extension number.http://www.cisco.com/c/en/us/td/docs/ios/12_2/voice/configuration/guide/fvvfax_c/vvfclid.html