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Polycom 1725-11530-310 User Manual

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 Administrator’s Guide Addendum for the Polycom VVX 1500 Business Media Phone
1 - 5
Video Codecs
The following table summarizes the Polycom VVX 1500 phone’s video codec 
support:
Configuration changes can performed centrally at the boot server:
Audio Codecs
The following table summarizes the Polycom VVX 1500 phone’s audio codec 
support:
Algorithm
MIME Type
Bit Rate
Frame 
Rate
Frame Size
Effective 
video 
bandwidth
H.263
H263/90000,
H263-1998/90000
64 kbps to 
768 kbps
5 fps to 
30 fps
Tx Frame size:CIF,
QCIF
Rx Frame Size:CIF, 
QCIF, SQCIF, QVGA, 
SIF
Refer to Bit 
Rate column.
H.264
H264/90000
64 kbps to 
768 kbps
5 fps to 
30 fps
Tx Frame size:CIF,
QCIF
Rx Frame Size:CIF, 
QCIF, SQCIF, QVGA, 
SIF
Refer to Bit 
Rate column.
Central 
(boot server)
Configuration file: 
sip.cfg
Specify codec priority, payload type and jitter buffer tuning 
parameters.
•
For more information, refer to 
on page 
 on 
page 
Algorithm
MIME Type
Ref.
Bit Rate
Sample 
Rate
Frame Size
Effective 
audio 
bandwidth
G.711
μ-law
PMCU
RFC 1890
64 Kbps
8 Ksps
10ms - 80ms
3.5KHz
G.711a-law
PCMA
RFC 1890
64 Kbps
8 Ksps
10ms - 80ms
3.5KHz
G.722
G722/8000
RFC 1890
64 Kbps
16 Ksps
10ms - 80ms
7 KHz
G.722.1
G7221/16000
RFC 3047
16 Kbps, 
24 Kbps, 
32 Kbps
16 Ksps
20ms - 80ms
7 KHz
G.722.1C
G7221/
32000
G7221C
24 Kbps
32 Kbps
48 Kbps
32 Ksps
20ms - 80ms
14 KHz