GDI SM560SA 56K Dialup Modem

GDI SM560SA 56K Dialup Modem
SM560 57600 bps, Internal 170 or Rack Mount
1-301-924-7400 ext. 17

Features GDI Smart Modem SM560SA
* V.90/K56flex Autospeed
* Error Correction / Data Compression
* Call Monitor Speaker
* Standard “AT” Command Set
* Integral Power Supply
* Dual RS232/RS485 Interface
* Wide Operating Temperature Range –37 to +74oC


The GDI Smart Modem SM560SA is an AT command set compatible dial-up modem. This modem has been designed specifically for the demands of the traffic industry. The GDI Smart Modem SM560SA can be used to communicate with traffic controllers, variable message signs, dial-up to the web or most any other dial-up application that requires communications over the public switched network.

The GDI Smart Modem SM560SA offers 26 data rates from 300 to 56,000 bps. The GDI Smart Modem SM560SA is “AT” command set compatible with auto-dial, auto-answer, and auto-speed detect. The GDI Smart Modem is compatible with the GDI Smart Modem SM336A dial-up modem. The internal fused power supply eliminates the common “brick” external power supply.

General Specifications


Modulation Quadrature Amplitude Modulation


Serial Interface 115.2 kbps max, V.24/V.28, V.34 RS232/RS485 compatible

Data Rates 56, 54-36, 33.6, 31.2, 28.8, 26.4, 24, 21.6, 19.2, 16.8,14.4,12, 9.6, 7.2, 4.8, 2.4, 1.2 and 0.3 Kbps

Automatic selection for highest error free rate

230,400 maximum throughput

Compatibility As a Data Modem

Bell 103, Bell 212A, V.22A/B, V.22bis, V.32, V.32bis, V.34, and V.90/K56Flex

As a Fax Modem

V.17, v.21 channel 2, v.27ter, v.29, and V.33

Data Compression V.42bis, MNP5

Error Correction V.42 LAPM, MNP2-4, MNP10

Loop Tests V.54 Loop 2 (RDL) and Loop 3 (LAL)

Modes Asynchronous full or half duplex

Automatic/manual call originate and answer

PC Compatible Serial Plug and Play

Data & Line Interfaces

Data RS232C and RS485 via DB-9S

Phone handset RJ11

Phone line RJ11

Telephone Line Interfaces

FCC compliant Part 68 and Part 15

Line Interface RJ11, 600 ohms, Public Switched Network

Ring Equivalent 1 Bel

Return Loss Better than 14dB from 200 to 4000 Hz

Dialing Pulse and Tone

Receiver Performance

Signal to Noise Ratio -26 dB

Dynamic Range -12 dBm to –42 dBm

Ring Detect Sensitivity 38 VRMS

Transmit and Receive Frequencies

Data Carrier 1800 +/- 0.5 Hz

Calling Tone 1300 +/- 10 Hz

Answer Tone 2100 +/- 15 Hz

Receive Frequency +/- 14 Hz

Transmit Level Fixed at –11 +/- 2 dBm




DTR On/Off

RS485 Data Standard or Inverted

RS485 Control Lines Standard or Inverted

Power Requirements

Voltage 90 to 130 VAC (Standard)

180 to 260 VAC (optional)

Frequency 60 Hz +/1 3 Hz

Power 6 watts maximum


Size 1.5" H x 5.5" W x 8.5" D

Weight 2 lbs


Temperature Range -37 to 74oC

Humidity 5 to 95% non-condensing

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