MTCBA-C-N9 Multi-Tech Systems, MTCBA-C-N9 Datasheet - Page 18

• Manufacturer Part Number: MTCBA-C-N9
• Description: MODEM CDMA RS-232 DC AKEY=0
• Manufacturer: Multi-Tech Systems
• Series: MultiModem® CDMAr

Specifications of MTCBA-C-N9

• Function: Transceiver, CDMA, Modem
• Modulation Or Protocol: CDMA2000
• Frequency: 800MHz, 1.9GHz
• Applications: General Purpose
• Interface: RS-232
• Data Rate - Maximum: 153.6 kbps
• Features: Generic
• Voltage - Supply: 5V
• Package / Case: Module with Case
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Phone Numbers for the Wireless Modem
Examples of Useful AT Commands
A Note About HyperTerminal
In order to verify signal strength and roaming status, you must use a terminal application such as HyperTerminal. To
open this program in Windows XP or Windows 2003, go to Start > All Programs > Accessories > Communications
> HyperTerminal. Other Windows operating systems have similar paths to HyperTerminal. See your system’s online
Help if you cannot find it.
A Note About AT Commands
CDMA commands is included on the MultiModem CD and on the Multi-Tech Web site.
The following two commands let you query signal strength and roaming status.
Multi-Tech Systems, Inc. MultiModem CDMA Wireless Modem User Guide
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•
Verifying Signal Strength
Checking Network Registration and Roaming Status
Checking the Modem’s Identity
Every wireless modem will have its own unique phone number.
The phone number will be given to you by your wireless service provider. Wireless provider implementations
may vary.
Using HyperTerminal, type AT+CSQ
The modem responds with the received signal strength (rssi) and bit error rate (ber).
BER values are always 99.
RSSI ranges are from 0 to 31.
In this procedure, you will verify that the Wireless MultiModem has been registered on the wireless network.
Using HyperTerminal, type AT+CREG?
The modem will respond in one of the following ways:
Use the ATI command (Note: This command is illustrated using the capital letter i after AT)
Chapter 3 – Using Your Wireless
Note:
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•
•
is the strength of the received signal.
If the modem indicates that it is not registered, verify the signal strength to determine if the problem
Note:
strength. See the AT Command guide for details.
Type ATI0 (Note: The command ends in a zero)
The manufacturing data displays. For example, xxxxx Modem 800 1900
Type ATI3
The software version displays. For example, S/W VER: xxxxx
Type ATI6
The capability data displays. For example, +CGSM, +CIS707, ...
10 - 31
0 - 9
99
Value
0,0
0,1
0,5
Signal Strength Verification – RSSI
Modems provisioned for the Sprint network have a different range of values for signal
Network Registration Status
The modem is not registered on any network
The modem is registered on the home network
The modem is registered on a network and it is roaming
Sufficient
Weak or Insufficient
No signal
Network Registration Verification
Modem
Chapter 3 – Using Your Wireless Modem
18