Outbound Call Codec Selection Codes; Miscellaneous Parameters; Dtmf Parameters - Cisco SPA301 Administration Manual

Configuring Regional Parameters and Supplementary Services

Miscellaneous Parameters

Miscellaneous Parameters
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide

Outbound Call Codec Selection Codes

Codec call selection codes affect voice quality. For more information about voice
codecs, see the Configuring Voice
force
for a call or a call to use a specific codec:
G.711u (*017110)
• Prefer
codec for next outbound call. If the preferred codec is unavailable, the
second, then the third preferred codec is used, if specified.
G.711u (*027110)
• Force
codec for next outbound call. If the specified codec is unavailable, the
preferred codecs are used in order, if specified.
See Configuring Voice Codecs
This section describes Dual Tone Multi-Frequency (DTMF) and localization
parameters:

DTMF Parameters

DTMF is used by touch-tone phones to assign a specific frequency (consisting of
two separate tones) to each key so that it can easily be identified by a
microprocessor.
In-Band and Out-of-Band (RFC-2833): IP phones can relay DTMF digits as
out-of-band events to preserve the fidelity of the digits. This can enhance the
reliability of DTMF transmission required by many IVR applications such as dial-up
banking and airline information.
The following parameters can either reduce false detection or get better detection
by the IVR. In general, the default values are recommended for both IVR functions.
DTMF Playback Level
•
to one decimal place. Applicable locally when a user presses a digit or when
the phone receives an out-of-band (OOB) DTMF signal from the network
side. Does not affect DTMF transmission. Defaults to -16.
DTMF Playback Length
•
Affects only OOB. Defaults to . 1 .
Codecs. You can choose a
G.729a (*01729)
through
G.729a (*02729)
through
for more information.
: Local DTMF playback level in decibels per minute, up
: Local DTMF playback duration in milliseconds.
7
preferred
codec
—Sets the preferred
—Forces the specified
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