Cisco 2650 - 2650 Router Specifications download pdf (Page 202)

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Cisco IOS Telephony Service, Version 2.02

Chapter 5 Command Reference

paging-dn (ephone)

phones that are in the idle state through the speakerphone mode. The IP phone display shows the “name”

information associated with the paging DN used to activate the page. During an active paging, incoming

or outgoing call for an answered or initiated call disconnects the IP phone from the paging output.

The paging mechanism supports audio distribution using IP multicast, replicated unicast, and a mixture

of both (so that multicast is used where possible, and unicast is used with specific phones that cannot be

reached through multicast).

Each Cisco IP phone can be associated with only one paging directory number (paging-dn); however,

paging-dns may be grouped in order to join groups of IP phones together. Only single-level grouping is

supported (no support for groups of groups), which allows for paging to IP phones for individual

departments (for example, sales, support, shipping, and accounting) and then allows these sets to be

combined into a group for “all employees” or “everyone in building 2.” Any number of phones may be

added into the same paging set using multicast. A Cisco IP phone (ephone) may directly belong to only

a single paging set. A paging set consists of all phones configured with the same paging-dn. Each paging

set uses a DN.

Examples The following example shows how to set up an ephone-dn for multicast paging:

ephone-dn 22

name Paging Shipping

number 5001

paging ip 224.1.1.10 port 2000

ephone 4

mac 0030.94c3.8724

button 1:1 2:2

paging-dn 22 multicast

This example creates a paging number for 5001 on ephone-dn 22 and adds ephone 4 as a member of the

paging set. Multicast is set for the paging-dn. Note that multicast addresses always take the form of

224.x.x.x.

Note For unicast paging to all phones, omit the IP multicast address in the ephone-dn configuration. For

unicast paging to a specific phone using an ephone-dn configured for multicast, add the unicast keyword

after the paging-dn command in ephone configuration mode.

Each ephone-dn used for paging can support a maximum of ten distinct targets (IP addresses and

interfaces). A multicast address counts as a single target for each physical interface in use (regardless of

the number of phones connected via the interface). Each unicast target counts as a single target, such that

paging that does not use multicast at all is limited to paging ten phones. For example, ten IP phones

paged through multicast on Fast Ethernet interface 0/1.1 plus five IP phones paged through multicast on

FastEthernet interface 0/1.2 is counted as two targets.

For simultaneous paging to more than one paging ephone-dn, we recommend that you use different IP

multicast addresses (not just different port numbers) for paging configuration. Note that multicast

addresses always take the form of 224.x.x.x.

Related Commands Command Description

ephone-dn Enters ephone-dn configuration mode and configures the directory

numbers for the Cisco IP phone lines.

number Configures a valid number for the Cisco IP phone.

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