Maxim Integrated Teridian V.22 bis Linux Softmodem for 73M1822/73M1922 MicroDAA - Manual (Page 38)

V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043
38 Rev. 1.5
S25 Protocol Selection
 0
No protocol detection selected. Modem looks for ODP/ADP on connection.
This is used when the host does not do the initial protocol detection.
Bit 0 1 Disconnect if no protocol is detected
Bit 1 1
V42-LAPM protocol selected. This option enables the ODP/ADP
sequence detection support within the TSC Softmodem if not
supported by the host processor.
When a connection is made and the selected protocol is detected an appropriate result
code is returned:
PROTOCOL: NONE or ‘70’
PROTOCOL: LAPM or ‘77’
If 1.5 seconds after CARRIER is established, and no protocol is detected, PROTOCOL:
NONE or result code ‘70’ will be sent.
S79 FSK Originate Carrier Detect Level
n 1 – 96
 35 -45dBm threshold.
S79 determines at what minimum level carrier is detected for originating FSK. A larger
number corresponds to a lower signal level threshold.
S80 FSK Answer Carrier Detect Level
n 1 – 96
 35 -45dBm threshold.
S80 determines at what minimum level carrier is detected for answering FSK. A larger
number corresponds to a lower signal level threshold.
S81 PSK Originate Carrier Detect Level
n 1 – 96
 40 -45dBm threshold.
S81 determines at what minimum level carrier is detected for originating PSK. A larger
number corresponds to a lower signal level threshold.