2400-BPS Internal Modem  (250-3025B)  Specifications   Faxback Doc. # 5788

Modem Compatibility:...........................CCITT V.22 bis at 2400 bps
                                     Bell 212A and CCITT V.22 at 1200 bps
                                                     Bell 103J at 300 bps

Command Compatibility:......................Hayes Extended AT command set

Modem Data Rates:................................ 2400, 1200, and 300 BPS

SPEED SELECTION:

Originate Mode:..........................Automatic on attention character
Answer Mode:..................Automatically set to speed of incoming call

Test Modes:.......................................Analog (local) loopback
                                              (both initiate and respond)
                                              Software command controlled

Receiver Sensitivity:.............................................-43 Dbm
Transmit Level:...................................................-10 Dbm
Line Impedance:..................................................600 Ohms

Error Rate:...........................................1 in 105 characters
                                      on standard 3002 unconditioned line

Modulation:.........................300 bps:  Frequency shift keyed (FSK)

1200 bps:...........................differential phase shift keyed (DPSK)
2400 bps:...................................16-point quadrature amplitude
                                   modulation/Phase-shift keyed (QAM/PSK)
DAILING:

Pulse:....................................................Rotary (10 pps)
Tone:................................................. Including * and #,
Duration:..............................................95 ms (adjustable)

Command Buffer:.............................................42 characters

Operating Temperature:..............................32 TO 104F (0 TO 40C)
Storage Temperature:............................-40 t +176F (-40 to +80C)
Humidity:............................................0-90% Non-condensing

(SMC/all-07/13/94)