Multi-Tech Systems MTCBA-G-UF1 ユーザーズマニュアル

Chapter 1 – Description & Specifications 

Multi-Tech Systems, Inc. MultiModem® GPRS with USB User Guide 

 

 

 

 

 

 

869 to 894 MHz 

 

824 to 849 MHz 

 

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 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 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.  Normally, this phone number is *99***1#  .