Specifications

Setting Up Cisco IP Phones
How to Set Up Cisco IP Phones
52
Cisco IOS Survivable Remote Site Telephony Version 3.4 System Administrator Guide
DETAILED STEPS
Examples
The following example sets the maximum number of DNs or virtual voice ports that can be supported
by a router to 10 and activates the dual-line mode for all IP phones in Cisco CallManager fallback mode.
call-manager-fallback
max-dn 10 dual-line
exit
Command or Action Purpose
Step 1
call-manager-fallback
Example:
Router(config)# call-manager-fallback
Enters call-manager-fallback configuration mode.
Step 2
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 24 for further
details.
• dual-line—(Optional) Allows IP phones in Cisco
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 58 for
more information on using the max-dn command with
the alias command.
Step 3
exit
Example:
Router(config-cm-fallback)# exit
Exits call-manager-fallback configuration mode.