Cisco SPA301 User Manual

Getting Started
Ensuring Voice Quality
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 33
1
Ensuring Voice Quality
Voice quality perceived by the subscribers of the IP Telephony service should be
indistinguishable from that of a PSTN.
Supported Codecs
The table shows the codecs (voice compression algorithms) supported by
Cisco SPA IP phones. The Mean Opinion Score (MOS) measures the voice quality
by using a scale of 1–5, where 1 is the lowest quality and 5 is the highest quality.
181 Set the IP multicast address (used by the Cisco SPA 9000 to
communicate with the IP phone). Enter the address (use * to enter the
decimal (.)), then press #.
To s a v e , p r e s s 1; to review, press 2; to re-enter, press 3; to exit, press *.
7932 Enable or disable the web-based configuration utility. Press 1 to enable
or 0 to disable, then press #.
To s a v e , p r e s s 1; to review, press 2; to re-enter, press 3; to exit, press *.
723646 Enable or disables access to the administrative (admin) login on the
configuration utility. Press 1 to enable or 0 to disable, then press #.
To s a v e , p r e s s 1; to review, press 2; to re-enter, press 3; to exit, press *.
Number Option
Codec Complexity and Description MOS
G.711 (A-law
and u-law)
Very low complexity. Supports uncompressed
64 kbps digitized voice transmission at one to ten
5ms voice frames-per-packet. This codec
provides the highest voice quality and uses the
most bandwidth of any of the available codecs.
4.5

Cisco SPA301 Specifications

General

Brand	Cisco
Model	SPA301
Category	IP Phone
Language	English