User Manual

73M2901CE AT Command User Guide UG_2901CE_027

28 Rev. 2.0

4.4.23 S22 – Bit Mapped Register

(Default = 36h)

defined as follows:

Bit 2 Bit 1 Bit 0 Function: Synchronous/Asynchronous Control

0 0 0 Y0 Asynchronous Mode

0 0 1 Y1 Synchronous Mode

1 0 0 Y4 Quasi-Synchronous Mode

1 1 0 Y6 Asynchronous with speed buffering (Default)

Bit 6 Bit 5 Bit 4 Bit 3 Function: Select Result Code Set

0 0 0 1 X0 Enable Result Codes 0-4.

0 0 0 0 X1 Enable Result Codes 0-5, 10.

0 0 1 0 X2 Enable Result Codes 0-6, 10.

0 1 0 0 X3 Enable Result Codes 0-5, 7, 10.

0 1 1 0 X4 Enable Result Codes 0-7, 10. (Default)

1 0 0 0 X5 Enable Result Codes 0-5, 10, and detect BUSY at OFF HOOK.

1 0 1 0 X6 Enable Result Codes 0-6, 10, and detect BUSY at OFF HOOK.

1 1 0 0 X7 Enable Result Codes 0-5, 7, 10, and detect BUSY at OFF HOOK.

1 1 1 0 X8 Enable Result Codes 0-7, 10, and detect BUSY at OFF HOOK.

Result Code 0 = OK

Result Code 1 = CONNECT

Result Code 2 = RING

Result Code 3 = NO CARRIER

Result Code 4 = ERROR

Result Code 5 = CONNECT 1200

Result Code 6 = NO DIALTONE

Result Code 7 = BUSY

Result Code 8 = NO ANSWER (if @ dial modifier is used and quiet answer is not detected within S7)

Result Code 9 = CONNECT 0600

Result Code 10 = CONNECT 2400

Result Code 11 = CONNECT 4800

Result Code 12 = CONNECT 9600

Result Code 13 = CONNECT 7200

Result Code 14 = LINE-IN-USE

Result Code 22 = CONNECT 75/1200

Result Code 23 = CONNECT 1200/75

bit 7 0 = Pulse dialing make/break ratio = 39/61 (U.S.) (Default).

1 = Pulse dialing make/break ratio = 33/67 (U.K., Hong Kong).

This bit has an effect only when S32 or S33 are set to zero.

4.4.24 S23 – Busy Detect Cadence Count

(Default = 3)

Defines how many busy cadence cycles before sending the busy result code.