
B-4 Courier I-modem Getting Started Guide
Additional Specifications
This feature Supports
Serial port DB-25
Serial interfaces EIA RS-232
Supported serial port rates 230400, 115200, 57600, 38400, 19200, 9600, 4800,
2400, 1200, and 300 bps
Adaptive Speed Leveling (ASL) 21600, 19200, 16800, 14400, 12000, 9600, 7200,
and 4800 bps
ISDN physical interface RJ45 jack
Communications channel ISDN B-channels
Data format Binary, serial; defaults to 8-bit word length, no
parity, and 1 stop bit.
Word
Length
Parity (1 Bit) Stop Bits
7 Even, Odd 1
8 None 1
Flow Control Buffers Variable sizes
Command Buffer 56 characters, excluding the AT prefix, Carriage
Return, and spaces
Test Options Remote digital loopback, digital loopback, test
pattern, and dial test
Failed Call Timeout 60 second default, programmable 2-255 sec.
Answer Tone Timeout 60 seconds
Answer Tone Detector 2080-2120 Hz
Loss of Carrier (Disconnect
Timer)
0.7 second default, programmable 0.2-25.5 sec.
Equalization Adaptive
Receive Sensitivity - 44 dBm + 2 dBm
Transmit Level - 9 dBm maximum
Transmitter Frequency Tolerance .01%
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