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UC-P100-S/UC-P110-S Phones for Skype for Business
Supplemental Guide – DOC. 8412A
Parameter
Permitted Values
Default
voice.handset_send
Integer from -50 to 50
0
Description:
Configures the sending volume of the handset.
Note: We recommend that this parameter be modified cautiously. An unreasonable value may
render the voice quality bad. If the parameter is changed, the phone will reboot to make the
change take effect.
Web User Interface:
None
Phone User Interface:
None
voice.headset_send
Integer from -50 to 50
0
Description:
Configures the sending volume of the headset.
Note: We recommend that this parameter be modified cautiously. An unreasonable value may
render the voice quality bad. If the parameter is changed, the phone will reboot to make the
change take effect.
Web User Interface:
None
Phone User Interface:
None
Audio Codecs
CODEC is an abbreviation of COder-DECoder, capable of encoding or decoding a digital
data stream or signal by implementing an algorithm. The object of the algorithm is to
represent a high-fidelity audio signal with a minimum number of bits. This can effectively
reduce the frame size and the bandwidth required for audio transmission.
The audio codec the phone uses to establish a call should be supported by the SIP server.
When placing a call, the phone will offer the enabled audio codec list to the server and
then use the audio codec negotiated with the called party according to the priority.
The following table lists the audio codecs supported:
Supported Audio Codecs
Supported Audio Codecs
Default Audio Codecs
G722, PCMA, PCMU, G729, G726-16, G726-24, G726-32, G726-40,
iLBC, G723_53, G723_63, SILK_NB, SILK_WB
G722, PCMA, PCMU, G729
The following table summarizes the supported audio codecs on phones:
Audio Codec Details
Codec
Algorithm
Reference
Bitrate
Sample Rate
Packetization Time
G722
G.722
RFC 3551
64 Kbps
16
20ms
PCMA
G.711 a-law
RFC 3551
64 Kbps
8 Ksps
20ms
PCMU
G.711 u-law
RFC 3551
64 Kbps
8 Ksps
20ms