Antenna/Rf Specifications; At Command Info; Phone Number For The Wireless Modem; Network Access - Multitech MultiModem MTCBA-G-F1 User Manual

Antenna/RF Specifications

If the antenna shipped with the bundled version does not meet your application requirements (for size,
shape,mounting style, etc.), you may supply an antenna yourself. The antenna used must be of the correct
frequency and must be a style appropriate to the application. See the Antenna/RF Specifications section below.
Frequency RX
Frequency TX
RF Power Stand
Impedance
VSWR
Typical Radiated Gain
Frequency RX
Frequency TX
RF Power Stand
Impedance
VSWR
Typical Radiated Gain

AT Command Info

AT commands for the GPRS wireless modem are published in a separate Reference Guide
included on the MultiModem CD and posted on the Multi-Tech web site.
IP commands for GPRS modems are also published in a separate Reference Guide included
on the MultiModem CD and posted on the Multi-Tech web site.

Phone Number for the Wireless Modem

•
Every wireless modem will have its own unique phone number.
•
The wireless modem's phone number may simply be told to the subscriber or be on the
SIM or both. Wireless provider implementations may vary.

Network Access

The network access arrangements to be specified in Windows Dial-Up Networking (of the
computer that the wireless modem is serving) will vary according to the type of wireless service
used.
•
For GSM-without-GPRS, a circuit-switched data connection is used. The user can set up
DUN to make a conventional V.32 modem connection to any terminating modem at the
other end. The phone number specified in DUN can be one supplied by the wireless
service provider or another phone number related to a different dialup modem service (e.g.,
a dialup modem service phone number from any commercial or private dialup network).
•
For GSM-with-GPRS, a single DUN number is generally used by all of a wireless provider's
subscribers throughout its area of coverage (regional, nationwide, continental, etc.).
Rather than being a literal phone directory number, as in conventional DUN, this is a code
that gives the modem Internet access.
Multi-Tech Systems, Inc. MultiModem® GPRS User Guide
GSM 850
869 to 894 MHz
824 to 849 MHz
2W at 12.5% duty cycle
50 ohms
<2
0 dBi on azimuth plane
GSM 1800
1805 to 1880 MHz
1710 to 1785 MHz
1W at 12.5% duty cycle
50 ohms
<2
0 dBi on azimuth plane
Chapter 1 – Description & Specification
EGSM 900
925 to 960 MHz
880 to 915 MHz
2W at 12.5% duty cycle
GSM 1900
1930 to 1990 MHz
1850 to 1910 MHz
1W at 12.5% duty cycle
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