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62 - 165 IP Telephony v1.0 Lab 4.1.3 Copyright © 2005, Cisco Systems, Inc.
j. Use the command show isdn status and verify that Layer 1 is ACTIVE, and that Layer 2 shows
MULTIPLE_FRAME_ESTABLISHED.
CMERouterX# show isdn status
k. Did the show isdn status command output show the proper states (ACTIVE and
MULTIPLE_FRAME_ESTABLISHED)? If not, perform appropriate troubleshooting. __________
l. In the show isdn status output notice on the second line of the output that a serial port is listed.
m. Write the serial interface port number as this number is shown in the command output. This
number is needed in the next step. _______________________
n. Use the show interface serial mod/port_or_subslot/port:23 to verify that the interface status
is up and up. Examples of this command on a 2811 router are show interface serial 1/0/0:23 or
show interface serial 1/0:23 (depending on the hardware being used).
CMERouterX# show interface serial mod/port_or_subslot/port:23
Step 4 Configure the Dial-Peer to Call the Analog Phone
a. Reference Table 2 to test the configuration. Before testing the TI, test standard phone
configuration by calling one of the IP phones from the analog phone attached to the router FXS
port. (Note: only four digits are needed for dialing.)
Note that if any connection exists between the router FX0 port and the Adtran unit, remove that
connection.
b. Does the analog phone to IP phone connection work properly? If not, troubleshoot as necessary.
_________________
c. Connect a second analog phone to the port on the Adtran Octal FXS that corresponds to your
pod number. For example, if pod 2 is being used, connect the analog phone to port 2 of the
Adtran Octal FXS card. Place a call from one of the IP phones to the analog phone connected
directly to the Adtran. (Note: The Adtran analog (FXS) port 1 phone number is 555-6001; port 2
is 555-6002; port 3 is 555-6003, etc.) Note that the call should not connect.
From the analog phone connected to the FXS router port, call the analog phone connected
directly to the Adtran analog (FXS) port. (555-600x, where x is the pod number).
d. Based on what has been learned thus far, why did the phone calls fail? __________________
__________________________________________________________________________
e. What audio and visual indications were shown on the IP phone when the call was made?
____________________________________________________________________________
f. A previous lab configured a dial-peer for the local FXS port. This step and the ones that follow
configure a dial-peer for a phone number on the simulated PBX (Adtran). This dial-peer will use
the PRI port on the router to access the cloud (the analog (FXS) port on the Adtran). The dial-
peer voice command creates a specific dial-peer for an analog connection.
CMERouterX(config)# dial-peer voice 2 pots
g. Commands in this step tell the router which port to forward the call through for a specific number.
The destination-pattern number command defines the phone number that will be forwarded.
Different symbols can be used to define the number or range of numbers in the destination