High Speed Fax Allows communication with any ITU-T Group III compatible fax device. Remote Configuration Front panel and AT driven Option settings of a remote unattended modem can be changed over phone line Password security denies access to unauthorized users. Auto-mode ITU-T V.8 compliant. Ensures connection at highest common rate. Automatic Rate Adaptation (ARA) Dynamically adjusts data rate backward or forward to conform to various line conditions. Multiple levels of security Password, password with callback, user-programmed. Capacity 50 passwords/50 phone numbers. Dial backup Switches to a dial line if leased line connection fails. Automatically returns to leased line operation. Integrated V.25 bis Combines modem and auto-call. Requires only one port on host machine.  Asynchronous Error correction/ Data compression ITU-T standard V.42bis Hayes AT command set compatible 2 and 4-wire leased line operation Storage for nine phone numbers Autodial Auto-answer Call progress indication Software volume control Rack-mountable

Data Rates ITU-T V.34 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800, 2400 ITU V.32bis 14400, 12000, 9600, and 7200 bps trellis coded ITU V.32 9600 and 4800 bps uncoded ITU V.22bis 2400 and 1200 bps ITU V.21 300 bps (async only) Bell 212A 1200 bps Bell 103 300 bps (async only) Operation 2-wire full-duplex dial-up or leased line 4-wire full-duplex leased line Modulation Compatible with ITU-T V.34, V.33, V.32bis, V.32, V.29, V.27, V.22bis, V.22, V.21, and Bell 212A and 103 Error Correction/Data Compression Protocols MNP 2-5; ITU-T V.42/V.42bis Transmitter Output Level -9 dBm permissive, -9 to -30 dBm in 1 dB increments for cellular applications 0 to -30 dBm in 1 dB increments for leased line operations (V.34: -6 to -30 dBm in 1 dB increments for leased line operation) Carrier Detect Level Dynamic to -43 dBm RTS/CTS Delay 0 to 150 ms (?2 ms) in 10 ms increments Line Equalization Automatic adaptive Timing Internal, external, or receive Internal/External Transmit Clock Frequency Selected bit rate ?0.01% Digital Interface EIA-232D, ITU-T V.24; DB25 female connector Telco Connection 8-pin modular jack, dial and leased lines Test V.54 remote loopback control V.52 511 PN pattern Analog loopback Analog loopback with test pattern Local digital loopback Remote digital loopback Remote digital loopback with test pattern Test pattern generation/checking