Cisco 7821 Administration Guide

DescriptionParameter
Enable or disable the vertical service announcement
services on the phone.
Default: No
Service Annc Serv
Enable or disable the call recording services on the
phone.
Default: No
Call Recording Serv
Enable or disable reverse name lookup for the phone.
When enabled, the phone can searches the personal
address book and call history, server directory, and
either the configured LDAP or XML directory.
Default: Yes
Reverse Phone Lookup Serv
Ringtone
DescriptionParameter
Ring tone scripts for different rings.Ring1 to Ring12
Controls the duration of the silent ring.
For example, if the parameter is set to 20 seconds, the
phone plays the silent ring for 20 seconds then sends
480 response to INVITE message.
Silent Ring Duration
Extension Mobility
DescriptionParameter
Options to enable or to disable the extension mobility
support for the phone.
Default: No
EM Enable
Name of the domain for the phone or the
authentication server.
Default: Blank
EM User Domain
Specifies the duration of the phone session.Session Timer(m)
Specifies the duration for which it waits before it logs
out.
Default: 10
Countdown Timer(s)
Cisco IP Phone 7800 Series Multiplatform Phones Administration Guide
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Cisco IP Phone Troubleshooting
Ringtone

Cisco 7821 Specifications

General

Resolution	396 x 162 pixels
Lines	2
Speakerphone	Yes
Display	3.5-inch (89 mm) monochrome display
Ethernet Ports	2 x 10/100 Ethernet ports
Power	IEEE PoE Class 1
Headset Port	Yes
Protocols	SIP
Audio Codecs	G.711, G.722, G.729, iLBC
Weight	0.9 kg (1.98 lb)