ASM-31 multirate sync/async shortrange modem

Note: The ASM-31 has been discontinued. Contact us about your application and we will do our best to recommend a suitable alternative.

ASM-31 is a multirate sync/async shortrange modem that operates in full-duplex mode over 2-wire twisted pair lines, at selectable data rates from 1.2 kbps to 128 kbps. The RAD ASM-31 uses 2B1Q line coding and transmits data in full-duplex up to 5.5 km (3.4 miles), independently of the data rate. An adaptive equalizer provides noise immunity and high performance over low quality lines. The ASM-31 DTE interface options include V.24/RS-232, V.35, RS-530, X.21, G.703 Codirectional (64 kbps), Ethernet bridge, and Ethernet router. The line connection is provided via an RJ-45 or a 3-screw terminal block connector. The unit is configured using internal jumpers and switches.

ASM-31 can be ordered as a standalone unit or as a single modem card for the 19-inch RAD ASM-MN-214 rack. Diagnostics include local analog, local digital, and remote digital loopbacks. Front panel LEDs indicate data receive and transmit, control signal status, loopback test state, and synchronization loss. Line interface circuitry protects against lightning and power surges.

ASM-31 multirate sync/async shortrange modem product data sheet (pdf)

Note: The ASM-31 has been discontinued. Contact us about your application and we will do our best to recommend a suitable alternative.

Commonly ordered models of the ASM-31:
ASM31/115/530 6620030000
ASM31/115/UTP 6620090000
ASM31/115/V24 6620000000
ASM31/115/V35 6620010000
ASM31/230/530 6620130000
ASM31/230/IP 6620220000
ASM31/230/UTP 6620270000
ASM31/230/V24 6620100000
ASM31/230/V35 6620110000
ASM31/230/X21 6620120000
ASM31/24/V24 6620280000
ASM31/48/V24 6620350000
ASM31R/530 6621030000
ASM31R/UTP 6621190000

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