Akuvox SP-R5xP User Manual

Administrator’s Guide for Akuvox SP-R5xP IP Phones
Akuvox Proprietary and Confidential. Copyright © 2014 Akuvox network Co., Ltd..
Page 133 of 221
In addition to the codecs introduced above, IP phones also support codecs: G723_53, G723_63,
G726-16, G726-24, G726-32, G726-40 (Codecs G726-16, G726-24 and G726-40 are not applicable
to SP-R50P IP phones). Codecs and priorities of these codecs are configurable on a per-line basis.
The attribute “rtpmap” is used to define a mapping from RTP payload codes to a codec, clock rate
and other encoding parameters.
The corresponding attributes of the codec are listed as follows:
Codec Configuration Methods Priority Ptime
PCMU Configuration Files
Web User Interface
1 20~30
PCMA Configuration Files
Web User Interface
2 20~30
G729 Configuration Files
Web User Interface
3 20~80
G722 Configuration Files
Web User Interface
4 20~30
G723_53 Configuration Files
Web User Interface
0 30~60
G723_63 Configuration Files
Web User Interface
0 30~60
G726-16 Configuration Files
Web User Interface
0 20~30
G726-24 Configuration Files
Web User Interface
0 20~30
G726-32 Configuration Files
Web User Interface
0 20~30
G726-40 Configuration Files
Web User Interface
0 20~30
Packetization Time
Ptime (Packetization Time) is a measurement of the duration (in milliseconds) of the audio data in
each RTP packet sent to the destination, and defines how much network bandwidth is used for
the RTP stream transfer. Before establishing a conversation, codec and ptime are negotiated
through SIP signaling. The valid values of ptime range from 10 to 60, in increments of 10
milliseconds. The default ptime is 20ms. You can also disable the ptime negotiation.
Procedure
Configuration changes can be performed using the configuration files or locally.

Akuvox SP-R5xP Specifications

General

Brand	Akuvox
Model	SP-R5xP
Category	IP Phone
Language	English