Specifications

TechMemo 01-0011B August 26, 2004
19 of 24
&Kn
Enables or disables data compression:
• &K0 — data compression disabled.
• &K1 — auto enable/disable.
• &K2 — data compression enabled.
• &K3 — MNP5 compression disabled.
&Mn
Sets error control (ARQ) for connection 1200 bps and higher:
• &M0 — normal mode, error controlled.
• &M1 — reserved.
• &M2 — reserved.
• &M3 — reserved.
• &M4 — normal/ARQ.
• &M5 — ARQ mode.
&Nn
Sets connect speed. If connection cannot be made at this speed, the modem will hang up. When used with &Un, and &Un
is greater than 0, &Nn sets the ceiling connect speed. &Un sets the floor connect speed:
&Pn
Sets pulse (rotary) dial make/break ratio:
• &P0 — US/Canada ratio, 39%/61%.
• &P1 — UK ratio, 33%/67%.
&Rn
Sets Receive Data (RD) hardware flow control Request To Send (RTS) (see also &Hn):
• &R0 — reserved.
• &R1 — modem ignores RTS.
• &R2 — received data to computer only on RTS.
&Sn
Controls Data Set Ready (DSR) operation:
• &S0 — DSR override. DSR signal is always on.
• &S1 — DSR signal only comes on during a connection.
&Tn
Loopback test commands:
• &T0 — ends testing.
• &T1 — analog loopback. If a connection exists when this command is issued, the modem hangs up. When the test
starts, a CONNECT message is displayed.
• &T2 — reserved.
• &T3 — local digital loopback. If no connection exists, ERROR is returned.
• &T4 — enables remote digital loopback.
• &T5 — prohibits remote digital loopback.
• &T6 — starts remote digital loopback. If no connection exists, ERROR is returned.
• &T7 — remote digital loopback with self test and error detector.
• &T8 — analog loopback with self test and error detector.
Command Function
(See NOTE 2 for &N17 through &N38)
&N0 (see NOTE 1) &N8 — 14,400 bps &N17 — 28,800 bps &N24 — 37,333 bps &N31 — 46,666 bps
&N1 — 300 bps &N9 — 16,800 bps &N18 — 29,333 bps &N25 — 38,666 bps &N32 — 48,000 bps
&N2 — 1200 bps &N10 — 19,200 bps &N19 — 30,666 bps &N26 — 40,000 bps &N33 — 49,333 bps
&N3 — 2400 bps &N11 — 21,600 bps &N20 — 32,000 bps &N27 — 41,333 bps &N34 — 50,666 bps
&N4 — 4800 bps &N12 — 24,000 bps &N21 — 33,333 bps &N28 — 42,666 bps &N35 — 52,000 bps
&N5 — 7200 bps &N13 — 26,400 bps &N22 — 34,666 bps &N29 — 44,000 bps &N36 — 53,333 bps
&N6 — 9600 bps &N14 — 28,800 bps &N23 — 36,000 bps &N30 — 45,333 bps &N37 — 54,666 bps
&N7 — 12,000 bps &N15 — 31,200 bps &N38 — 56,000 bps
&N16 — 33,600 bps
NOTES:
1 — Variable rate. Connection speed determined by remote modem.
2 — &N17 through &N39 only apply to V.90 and V.92 modems.