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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)
OL-4008-01
Chapter5 Parameters and Defa ults
Operating Parameters
RxCodec
Description
Use this parameter to specify receiving-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
Table5-1 AudioMode Parameter Bit Definitions
Bit Number Definition
0 and 16 0/1—Disable/enable silence suppression for all audio codecs. Silence suppression is enabled by
default.
1 and 17 0—Enable selected low-bit-rate codec in addition to G.711. This setting is the default.
1—Enable G.711 only.
2 and 18 0/1—Disable/enable fax CED tone detection. This feature is enabled by default.
3 and 19 Reserved.
4-5 and 20-21 DTMF Transmission Method:
•0—Always in-band.
•1—By negotiation.
•2—Always out-of-band.
•3—Reserved.
6-7 and 22-23 Hookflash Transmission Method:
•0—Disable sending OOB hookflash message.
•1—By negotiation (H.245 message).
•2��Always out-of-band (H.245 message).
•3—Use Q931message to send user keypad information for DTMF or hookflash transmission.
8-15 and 23-31 Reserved.