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About Configuring the Cisco ATA 186 for FAX Passthrough
Note
About Configuring the Cisco ATA 186 for FAX
Passthrough
Cisco ATA 186 Installation and Configuration Guide
7-2
The standard-based protocol level (H.323/SIP) codec switch.
•
To interoperate with a Cisco gateway, which does not send protocol level codec
switch requests but can accept them, select the Cisco proprietary codec switch.
When you are using G.729A on one port, the other port automatically uses the
G.711u-law or G.711A-law codec.
There are two possible modes of configuration, ConnectMode and AudioMode.
ConnectMode
The ConnectMode bits in the Cisco ATA 186 configuration control the functions
described below. To interoperate with a Cisco gateway, Cisco recommends you
set the bits as follows:
•
Bit 7 (mask 0x80)—1 means enable FAX passthrough redundancy; 0 means
disable.
•
Bits 8-12 (mask 0x1F00)—Offset to NSE payload-type number 96. The
default value is 4 (as NSE payload-type number 100), and the valid values are
2 to 23 (98 to 119).
Bit 13 (mask 0x2000)—0 means use G.711u-law; 1 means using G.711A-law
•
as the new codec.
Bits 14, 15 (mask 0xC000)—Set as 00 to enable the FAX passthrough feature
•
using the Cisco proprietary method (recommended). Set as 11 to disable FAX
passthrough.
For example, a example, a *ConnectMode* setting of
payload-type number 100, G.711u-law codec, and no redundancy in FAX
passthrough mode.
AudioMode
Set to 0xXXXX0015 for line 1, or 0x0015XXXX for line 2, (X=don't care). This
setting enables FAX tone detection.
Chapter 7
Using the FAX Passthrough Feature
0xXXXX040X
means use NSE
OL-1267-01
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