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Chapter 1 – Product Description and Specifications
Multi-Tech Systems, Inc. MultiModem CDMA Wireless Modem User Guide 6
Benefits/Features in Applications
Short Development Time. The MultiModem CDMA Wireless Modem can make your existing and next
generation device, machine, or system, communication-ready without requiring any hardware changes to its
design. It actually provides faster time-to-market because it relieves the burden and expense of obtaining
network and RF approvals. This complete, ready-to-deploy wireless modem allows you to enhance your
product while you focus on developing its core features.
Voice Features. The MultiModem CDMA provides telephony and Dual Tone Multi Frequency (DTMF)
functionality as well as QCELP (13K) and echo cancellation.
Short Message Services. The MultiModem CDMA Wireless Modem offers SMS features such cell broadcast,
Over the Air Activation (OTA), OTASP, and OTAPA. The MultiModem CDMA is SMS Mobile Originated and
SMS Mobile Terminated.
Compatible Supplementary Services. The MultiModem CDMA Wireless Modem is compatible with
supplementary services such as call forwarding, call barring, multiparty, call waiting and call hold, calling line
identification, closed user group and explicit call transfer.
Management Features. The MultiModem CDMA Wireless Modem provides advanced management features
including phone book management, fixed dialing number, and real time clock and alarm management.
Industry-standard Modem Commands. The MultiModem CDMA Wireless Modem provides industry-standard
AT-style commands for ease of integration into your existing software application.
Industrial Chassis. The MultiModem CDMA Wireless Modem is packaged in a rugged, water resistant,
industrial chassis. The chassis has an RS-232 DE-15 Voice/Data interface connector and a permanent screw-
type power connector. It also has an SMA antenna connector. The chassis can be side-mounted on a panel or
top-mounted on a desktop or other surface. A set of LEDs indicates the modem’s operational status.
Packet-Switched Data. The MultiModem CDMA Wireless Modem supports CDMA 2000 1xRTT packet-
switched cellular data. This enables mobile Internet functionality by allowing interworking between the existing
Internet and the cellular network at speeds up to 153.6K bps (forward and reverse). Any service that is used
over the fixed Internet today – File Transfer Protocol (FTP), web browsing, chat, e-mail, telnet – is available
over the cellular network, as well.
Circuit-Switched Data (CSD). The MultiModem CDMA Wireless Modem supports CDMA IS-95A and IS-95B
circuit-switched cellular data connections. Circuit-switched data connections support speeds up to 14.4K bps
as well as Class 2.0 Group 3 fax. CSD cellular wireless connections are ideal for applications that require a
quick wireless replacement of an existing point-to-point analog dial-up connection. They integrate seamlessly
with your current application requiring little infrastructure change.
Internet-Enabled. Some models of the MultiModem CDMA Wireless Modem include an embedded TCP/IP
protocol stack to bring Internet connectivity to any device without making changes to its hardware design.
Using the Internet protocols and the wireless connection to an IP network, the modem sends and receives data
over the Internet. It can also serve a single web page in response to a web browser request.