3Com AccessBuilder 980/000048/001, User Manual, Page: 37 / 60

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Transmitter / Receiver Specifications
Modulation
CCITT V.34 (33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800,
14400, 12000, 9600, 7200, 4800, 2400 bps)
Non-proprietary V.32terbo (19200, 16800, 14400, 12000, 9600, 7200,
4800 bps)
CCITT V.32bis (14400, 12000, 9600, 7200, 4800 bps)
CCITT V.32 (9600, 4800 bps)
CCITT V.22bis (2400 bps)
CCITT V.22 (1200 bps)
CCITT V.21 (300 bps)
Bell 212A (1200 bps)
Bell 103J (300 bps)
Operation
2-wire or 4-wire synchronous/asynchronous private line, or 2-wire
PSTN operation.
Output level
Selectable 0 dBm to -15 dBm. 600 ohms impedance. (UK versions set to
-9 dBm for PSTN operation or -13 dBm for private wire. )