Network Features; Codec And Protocol Support - Cisco MGCP IP Phone Administrator's Manual

Supported Features

Network Features

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Codec and Protocol Support

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Cisco MGCP IP Phone Administrator Guide, Release 5.0 and Release 5.1
1-6
Interoperability with third-party CAs.
Up to six MGCP connections and call appearances.
IP address assignment—Dynamic Host Configuration Protocol (DHCP) client or manually
configured via a local setup menu
Network startup using DHCP and Trivial File Transfer Protocol (TFTP)
Domain Name System (DNS): The MGCP phone uses DNS lookups to locate its communication
partners (for example, a TFTP server or a CA. If a CA is unreachable, the MGCP phone queries the
DNS server for an alternate CA.)
Dynamic DNS and TFTP servers: You can configure additional DNS and TFTP servers in the
configuration files. Upon bootup, the phone first goes to the default TFTP server to download the
configuration files. If a new dynamic TFTP server is specified in the files, the phone requests a new
set of files from the specified server. If new DNS addresses are specified in the files, the phone uses
those addresses for lookups.
Telnet support—Allows the user to use telnet to connect directly to the Cisco MGCP IP Phone to
debug and troubleshoot the phone. See
more information on configuration parameters.
Ping support—Allows the user to use ping to see if a Cisco MGCP IP Phone is operational and how
long the response time is from the phone.
Traceroute support—Allows the user to use traceroute to see the path that a Cisco MGCP IP phone
traverses in the route to its desired destination.
Remote reset support—Allows a service provider to reset a phone from a remote site. This feature
provides a key tool for restarting the phone's registration process with the provider's call agent or
proxy and for receiving a new or updated configuration or firmware load from a designated TFTP
server.
Basic phone service including MGCP 0.1 and MGCP 1.0 headers
G.711 u-law codec
G.711 a-law codec
G.729a codec
DTMF out-of-band for G.729a codec compliant to RFC 2833
Local Connection Options (LCOs):
G.729a codec: supports low-bandwidth access for multitenant deployment
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– Voice activity detection (VAD) support
– Type of service (ToS) bit for Real-Time Transport Protocol (RTP)
XML support
Hypertext Transfer Protocol (HTTP)—The phone contains limited support for HTTP 1.1. The
phone uses HTTP to retrieve Call Manager XML files.
Chapter 3, "Configuring the Cisco MGCP IP Phone"
Chapter 1 Product Overview
for