Campbell Scientific

COM220 Phone Modem

ClimateCommunications

The COM220 phone modem enables communications between a computer and a Campbell Scientific data logger over a public switched telephone network. A Hayes-compatible modem is required at the computer site. The COM220 connects to the data logger at the field site. Most Campbell Scientific data loggers are compatible.

Quantity

Overview

The COM220 phone modem enables communications between a computer and a Campbell Scientific data logger over a public switched telephone network.
A Hayes-compatible modem is required at the computer site.
The COM220 connects to the data logger at the field site. Most Campbell Scientific data loggers are compatible.
Wide operating temperature range and low power requirements make it ideal for use at remote sites
Supports communication rates up to 115.2 kbps between modem and logger. (In practice, data transmission through phone lines is generally constrained to 33.6 kbps.)
Compatible with most Campbell Scientific data loggers
Offers both modem enabled (ME) and synchronous device communications (SDC) modes.
Allows user to set the number of rings before answering call.

Specification

Transmission Distance or Area	Worldwide
Operation	1200 to 115200 baud digital communications over phone lines
Operating Voltage	12 Vdc
Current Drain	~120 μA (quiescent) ~30 mA (active)
Communication Rate	9600, 38400, 57600, 115200 bps (between data logger and COM220, and selected by user)
Operating Temperature Range	-25° to +50°C (standard)
Standards	V.92, K56Flex, V.90, V.34, V.32bis, V32, V23, V22bis, V22, V.21, B212, B103
Registration	FCC US 3A4M508BSM2-T-W IC 2377 A-SM2TW TBR21
Service Requirements	If not available at the site, phone lines must be installed.
Dimensions	16.5 x 2.5 x 6.6 cm (6.5 x 1.0 x 2.6 in.)
Weight	0.16 kg (0.35 lb)