GUARD TONES
Guard tones of 1800 Hz or 550 Hz may is transmitted by the answering modem, for echo
suppression. Default - no guard tone. Guard tone will not be transmitted in Bell 212A or
103 modes.
COMMAND BUFFER SIZE
40 Characters maximum, which includes the required carriage return. The modem does
not count the required AT prefix.
FAILED CALL TIMER
2-255 seconds (Defaults to 30 seconds)
RESULT CODES (TO TERMINAL OR 170)
Ability to limit, abbreviate, or suppress codes
RECEIVE CARRIER DETECT
Off-to-On Threshold: -43 dBm On-to-Off Threshold: -48 dBm
Hysteresis: Greater than 2 dB
TIMING
Request to send-Clear to send Delay
As per CCITT and BELL protocols during modem handshaking.
Delay specified by register S26. (default 10 mS)
TIMING
DCD ON delay
As per CCITT and BELL protocols (600 mS)
TIMING
DCD OFF delay
52.5 +/- 12.5 mS at 2400,1200 bps
17
+/- 7 mS at 300 bps
PERFORMANCE
Bit Error Rate of 1 bit per 100,000 for a S/Noise Ratio of 10dB
TxD Level -10 dBm
RxD Level -45 dBm
POWER
+12 Volts +/- 5% at 200 mA
-12 Volts +/- 5% at 200 mA
170 CONTROLLER INTERFACE
ETA RS-232-C via standard 400 modem edge connector pinout or a 9 pin Male D-Sub
connector J14, user selectable.
