Multi-Tech Systems MT2456SMI22 manual S16 Test Mode Bit Mapped Options Status, S19 Reserved

Chapter 4 - V.22bis Commands

S16 - Test Mode Bit Mapped Options Status

S16 indicates the test in progress status. Default: 0

Bit 0 Local analog loopback. 0 = Disabled. (Default)

1 = Enabled. (&T1) Bit 1 Not used

Bit 2 Local digital loopback 0 = Disabled (default)

1 = Enabled (&T3)

Bit 3 Remote digital loopback (RDL) status 0 = Modem not in RDL

1 = RDL in progress Bit 4 RDL requested (AT&T6)

0 = RDL not requested (default)

1 = RDL requested (&T6) Bit 5 RDL with self test

0 = Disabled (default)

1 = Enabled (&T7)

Bit 6 Local analog loopback (LAL) with self test 0 = Disabled (default)

1 = Enable (&T8) Bit 7 --- Not used

S19 - Reserved

S19 is supported for backwards compatibility only. No value can be written. Responds with default value. Range: None

Default: 0

S20 - Reserved

S20 is supported for backwards compatibility only. No value can be written. Responds with default value. Range: None

Default: 0

S21 - V.24/General Bit Mapped Options Status

S21 indicates the status of command options. Default: 52 (34h) (00110100b)

Bits 0 - 1 Telephone Jack Control (&Jn). 0 = &J0 selected. (Default)

1 = &J1 selected.

2 = &J2 selected.

3 = &J3 selected.

Bit 2 CTS behavior (&Rn).

0 = CTS tracks RTS (&R0).

1 = CTS always on (&R1). (Default) Bits 3-4 DTR behavior (&Dn).

0 = &D0 selected.

1 = &D1 selected

2 = &D2 selected. (Default)

3 = &D3 selected.

Bit 5 RLSD behavior (&Cn). 0 = &C0 selected.

1 = &C1 selected. (Default) Bit 6 DSR behavior (&Sn).

0 = &S0 selected. (Default)

1 = &S1 selected.

Bit 7 Long space disconnect (Yn). 0 = Y0. (Default)

1 = Y1.

Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide 39