Multi-Tech Systems MTCBA-G-F1 ユーザーズマニュアル

Chapter 1 – Description & Specifications

Multi-Tech Systems, Inc. MultiModem GSM/GPRS User Guide

6

869 to 894 MHz

925 to 960 MHz

824 to 849 MHz

880 to 915 MHz

2W at 12.5% duty cycle

2W at 12.5% duty cycle

50 ohms

<2

0 dBi on azimuth plane

1805 to 1880 MHz

1930 to 1990 MHz

1710 to 1785 MHz

1850 to 1910 MHz

1W at 12.5% duty cycle

1W at 12.5% duty cycle

50 ohms

<2

0 dBi on azimuth plane

AT commands for the GSM/GPRS wireless modem are published in a separate Reference
Guide included on the product CD and posted on the Multi-Tech web site.

IP commands for GSM/GPRS modems are also published in a separate Reference Guide
included on the product CD and posted on the Multi-Tech web site.

•

  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.

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.