Ata Software Features; Voice Supported Codecs - Cisco SPA2102 Administration Manual

Introducing Cisco Small Business Analog Telephone Adapters

ATA Software Features

NOTE
ATA Software Features
Cisco Small Business ATA Administration Guide
• The IVR functions are accessed by connecting an analog telephone to Phone 1
only.
• For proper operation, the service provider should use an Outbound Proxy to
forward all voice traffic when the SPA8800 is located behind a router. If
necessary, explicit port ranges can be specified for SIP and RTP.
The ATA device is a full featured, fully programmable phone adapter that can be
custom provisioned within a wide range of configuration parameters. This section
contains a high-level overview of features to provide a basic understanding of the
feature breadth and capabilities of the ATA device.
The following sections describe the factors that contribute to voice quality:
• “Voice Supported Codecs,” on page 21
• “SIP Proxy Redundancy,” on page 22
• “Other ATA Software Features,” on page 23

Voice Supported Codecs

Negotiation of the optimal voice codec sometimes depends on the ability of the
ATA device to match a codec name with the codec used by the far-end device.
The ATA device allows the network administrator to individually name the various
codecs that are supported so that the ATA device can successfully negotiate the
codec with the far-end equipment. The administrator can select which low-bit-rate
codec is to be used for each line. G.711a and G.711u are always enabled.
You can configure your preferred codec in Configuration Utility. See
Payload Types section,” on page 129
page 169. See also “Supported Codecs,” on page 49
are supported on each ATA device.
and “Audio Configuration section,” on
for a list of which codecs
1
“SDP
21