
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048
Page 91
2. Device Type: Your cellular provider may ask you to identify the type of device that you are activating
on their network. The device type can be obtained from the modem documentation. Two common
types are Motorola Radio and Standard Communications CMR4100 radio.
After you have established an account with your cellular provider, you need to request the following
information from your cellular provider:
1. MIN: Mobile Identification Number, a 10-digit number that is your cellular modem/phone number.
2. SID: System ID, 5-digit number that defines the cellular system.
3. CAOC: Carrier Access Overload Class, a 2-digit number that defines the cellular carrier access
parameters.
4. CGID: Carrier Group ID, a 2-digit number that defines cellular network characteristics.
5. Network Preference: a parameter that selects the network operating characteristics.
To configure some cellular modems you may not require all of the above parameters. The StarComm
Cellular Modem only requires MIN, SID and Network Preference parameters. To input these parameters
you need to use the following commands:
Telephone Number: AT>M=mmmmmmmmmm{ENTER} (m = telephone number)
System ID: AT>S=sssss{ENTER} (s = SID)
Network Preference: AT>N=n{ENTER} (n = preference)
Your cellular modem should now be ready to operate.
Using the AT>Q{ENTER} command on a StarComm Cellular modem will
evaluate the quality of service at your particular location.
6.5.3. Understanding CDPD Cellular Modems
Cellular Digital Packed Data (CDPD, or Wireless IP
111
) is a superset of the AMPS specifically for
sending data over cellular network.
CDPD transmits data in small packets over cellular network using UDP
112
PAD
113
. If a connection is lost
during transmission, the CDPD cellular modem reconnects to the network and automatically retransmits
or re-receives the message in its entirety. Since it is completely digital, CDPD has low bit error rates at
higher speeds. The typical raw speed is 19.2 kbps. Generally, CDPD has lower operational costs than
analog wireless connections.
To activate and register your CDPD cellular modem with the cellular
network, it is necessary to select a CDPD service provider and acquire an
NEI (Network Entity Identifier), also known as an IP address.
111
IP is the acronym for Internet Protocol.
112
UDP (User Datagram Protocol) is a subset of TCP/IP, the standard internet protocol.
113
PAD is the acronym for Packet Assembly/Disassembly.
Comentarios a estos manuales