GDI SM2400 Series 2400 bps Dialup Modem

GDI Smart Modem SM2400 SM2400 (170 Plug-in) SM2400SA (standalone)
GDI SM2400 Series 2400 bps Dialup Modem
1-301-924-7400 ext. 17

Features

* Standard “AT” Command Set
* RS232 Interface
* Call Monitor Speaker
* Error Correction / Data Compression
* Integral Power Supply
* Rugged Metal Enclosure
* Wide Operating Temperature Range –37 to +74oC
* Standalone or 170 Plug-in Card

 

Description

The GDI Smart Modem SM2400 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 SM2400 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 SM2400 offers 3 data rates from 300 to 2400 bps. The GDI Smart Modem SM2400 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 SM2400 dial-up modem. The internal fused power supply eliminates the common
“brick” external power supply. The unit is also available in a 170 Plug-in form factor.

General Specifications

Modulation
Quadrature Amplitude Modulation FSK and DPSK

Serial Interface
RS232C compatible, Asynchronous 7 data bits with any parity type, 1 or stop bits, or 8 data bits with Mark or parity, 1 or 2 stop bits

Data Rates 2400, 1200, 300 bps Automatic selection for highest error free rate

Compatibility Bell 103, Bell 212A, V.22, V.22 bis,

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
DTMF Duration and spacing 50 to 255 ms

Receiver Performance
Signal to Noise Ratio -10 dB
Dynamic Range -10 dBm to –45 dBm
Indicators
SD, RD, OH, CD,AA and HS

Receiver Carrier Detect
Off-to-On Threshold -43 dBm
On-to-Off Threshold -48 dBm
Hysteresis Greater than 2 dB

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

NVRAM

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