Specifications
Setting Up the Network
How to Set Up the Network
47
Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide
DETAILED STEPS
Command or Action Purpose
Step 1
call-manager-fallback
Example:
Router(config)# call-manager-fallback
Enters call-manager-fallback configuration mode.
Step 2
ip source-address
ip-address
[port
port
]
[any-match | strict-match]
Example:
Router(config-cm-fallback)# ip source-address
10.6.21.4 port 2002 strict-match
Enables the router to receive messages from the Cisco IP
phones through the specified IP addresses and provides
for strict IP address verification. The default port number
is 2000.
Step 3
max-dn
max-directory-numbers
[dual-line]
[preference
preference-order
]
Example:
Router(config-cm-fallback)# max-dn 15 dual-line
preference 1
Sets the maximum number of directory numbers (DNs)
or virtual voice ports that can be supported by the router
and activates the dual-line mode.
• max-directory-numbers—Maximum number of
directory numbers or virtual voice ports supported
by the router. The maximum number is
platform-dependent. The default is 0. See the
“Platform and Memory Support” section on page 29
for further details.
• dual-line—(Optional) Allows IP phones in
Cisco Unified CallManager fallback mode to have a
virtual voice port with two channels.
• preference preference-order (Optional)—Sets the
global preference for creating the VoIP dial peers for
all directory numbers that are associated with the
primary number. Range is from 0 to 10. Default is 0,
which is the highest preference.
The alias command also has a preference keyword
that sets alias command preference values. Setting
the alias command preference keyword allows the
default preference set with the max-dn command to
be overriden. See Configuring Call Rerouting,
page 66 for more information on using the max-dn
command with the alias command.
Note You must reboot the router in order to reduce the
limit of the directory numbers or virtual voice
ports after the maximum allowable number is
configured.