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52 - 165 IP Telephony v1.0 Lab 4.1.1 Copyright © 2005, Cisco Systems, Inc.
Step 1 Verify FXS interface
a. Power on the router and switch.
b. Connect the IP phones. Test them by calling from one phone to another.
c. Use the show hardware privileged mode command to verify a FXS interface is installed in a
router.
d. How many FXS interfaces are installed based on the command output? ___________________
e. Look at the router and notice how the slots where WICs are installed are numbered. On a 2800
series router the slots are numbered to the side of the cards. On a 1760 or 2600 series router,
the slots are numbered below the WIC slot.
f. What slot is the FXS card installed into the router? ______________________________
g. Use the show voice port summary command to see a brief summary of the voice ports
installed on a router. The Ports column shows the slot that the FXS WIC is installed in the router.
The Ports column shows the WIC in a slot/subunit/port format.
h. How are numbers shown for the FXS WIC in the Ports column of the command output?
__________________________
i. Use the show voice port slot/subunit/port command to see detailed information about the
FXS card. For example, if the FXS WIC lists as 0/3/0 and 0/3/1 in the Ports column, the
command would be show voice port 0/3/0 or show voice port 0/3/1.
j. What is the Operation State of the voice port? _________________________________
k. What is the Administrative State of the voice port? ______________________________
l. Use the show running-config | begin voice-port command to see the section of the
configuration that deals with the voice ports. Notice that the syntax following voice-port is the
same as the previous show commands.
m. Using the show running-config command, can you determine whether the voice card is a FXS
or FXO card? ____________
Step 2 Connect Analog Phone
a. Connect an analog phone to FXS port 0 on the router using a phone cable. The FXS ports are
labeled with a 0 or a 1. Reference the photo below.