1-8
Cisco MGCP IP Phone Administrator Guide, Release 6.x and 7.x
Chapter 1 Product Overview
Supported Codecs and Dual Tone Multifrequency
•
Traceroute support—You can use “traceroute” to see the path that a phone traverses in the route to
its desired destination.
•
Remote reset support—You can configure a phone to enable a service provider to reset a phone from
a remote site. This feature provides a key tool for restarting the phone registration process with the
service provider call agent or proxy and for receiving a new or updated configuration or firmware
load from a designated TFTP server.
Supported Codecs and Dual Tone Multifrequency
The Cisco MGCP IP phone supports the following codecs:
•
G.711 mu-law codec
•
G.711 a-law codec
•
G.729a codec
The phone also supports dual tone multifrequency (DTMF) out-of-band signaling for G.729a codecs
compliant to RFC 2833.
Dialing and Messaging Features
The Cisco MGCP IP phone supports the following dialing and messaging features:
•
Message-waiting indication—Lights to indicate that a new voice message is in a subscriber mailbox.
If the user listens to the message but does not save or delete it, the light remains on. If a user listens
to the message and saves or deletes it, the light goes off. The message-waiting indicator (MWI) is
controlled by the voice-mail server. The indication is saved over a phone upgrade or reboot.
•
Notified entity—A CA can direct an endpoint to send notify messages to an alternate destination.
•
Call waiting, call transfer, call forward (unconditional, busy, no answer), announcement, music on
hold, and volume control. These features must be supported by the CA.
•
Three-way calling using an external multipoint control unit (MCU). This feature must be supported
by the CA.
Supported MGCP Commands
The Cisco MGCP IP phone supports the MGCP commands shown in
Table 1-1
.
Table 1-1
MGCP Commands
Command
Description
Direction
Notification Request
Specifies events that generate notifications to the CA.
CA to phone
Create Connection
Creates an RTP connection.
CA to phone
Modify Connection
Modifies an existing RTP connection.
CA to phone
Delete Connection
Deletes an endpoint RTP connection.
CA to phone
Audit Endpoint
Queries endpoint status.
CA to phone
Audit Connection
Queries connection status.
CA to phone
