
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048
Page 93
Forwarding a CDPD Packet
The cellular modem closes and sends a packet when one of the following events occurs:
The maximum packet length, set in register +WS74 (default 1000 bytes), is reached.
The modem receives the PAD Primary Forwarding Character set in register +WS64. This register
defaults to ASCII character {CR} (decimal value 13).
The PAD Inter-Character Timer (register +WS70) expires.
If you disable the primary forwarding character (register +WS63=0) and the timer (register +WS70=0),
the only way to forward packets will be to fill the packet buffer.
6.5.4. Sierra Wireless MP200 Sample Configuration
Below is an example configuration and network registration process for the Sierra Wireless MP200
cellular modem.
Start a terminal emulation program and configure your computer's serial communications port as follows:
PC Serial Port Setting
Value to set in Terminal
Emulation Program.
Baud Rate 19,200
Data Bits 8
Start Bits 1
Stop Bits 1
Parity None
Flow Control Hardware
Connect the cellular modem to your computer's serial communications port as illustrated in the diagram
below.
Figure 6-6. PC to cellular modem diagram.
Type AT{ENTER} and the cellular modem should respond with OK. If you do not get any response from
the cellular modem (no echo of the typed characters and/or OK), check the following:
The terminal emulation program setup
The cable connection between the modem and the computer
The power to the cellular modem
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