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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
OL-3410-01
Chapter5 Parameters and Defaults
Operating Parameters
TxCodec
Description
Use this parameter to specify the transmitting-audio codec preference. The following values are valid:
•0—G.723 (can be selected only if LBRCodec is set to 0)
•1—G.711A-law
•2—G.711µ-law
•3—G.729A (can be selected only if LBRCodec is set to 3)
Value Type
Integer
Range
0-3
Default
2
Voice Configuration Menu Access Code
37
NumTxFrames
Description
Use this parameter to select the default RTP packet side in number of frames per packet. The Cisco ATA
default frame sizes are as follows:
•G.711 and G.729—10 ms
•G.723.1—30 ms
For example, to receive 20 ms of G.729 packets, set the parameter to 2.
Value Type
Integer
Range
1-6
Default
2
Voice Configuration Menu Access Code
35