User's Guide

The Operational View SB300 Series
Page 32 Proprietary and Confidential 2110059 Rev 1.0
The extent to which the packet data is assembled and disassembled by the modem is determined
by setting the CDPD packet service mode to use SLIP, UDP, or TCP. Use of these protocols is
discussed later in this section.
5.2. Configuring NEI Entries
In order for the modem to register on a CDPD network it must have a unique Network Entity
Identifier (NEI). This is an Internet Protocol (IP) address assigned by your CDPD network service
provider. Section 2.2.1 CDPD Registration contains information on activating this service.
The service provider must assign you an NEI and channel side preference. They should also
provide their Service Provider Network Identifier (SPNI) number. To do this, the service provider
will need to know the Equipment Identifier (EID) of the modem which can be reported by the
modem by issuing the +WPEID command.
This information is recorded within the modem either by using the WirelessExpert configuration
program or through direct entry using AT commands. To use WirelessExpert please consult
Section 3.3.
If you need to access web sites on the Internet, a Domain Name Server (DNS) address is also
required. The modem does not manage this layer of the Internet connection but WirelessExpert
will record the DNS address in the Windows networking facility for use at the application level.
5.2.1. NEI Table
The modem can store up to four NEIs. One of these is the active NEI entry. The active entry is
the one on which most NEI related commands act. It can be different from the auto-register NEI
or a currently registered NEI. The active NEI is indicated by an index pointer stored in register
+WS197.
Although it is recommended, it is not necessary to de-register from the CDPD network before
making changes to the table. If you alter the NEI entry that is currently registered, the modem will
de-register the old value. If auto-register is enabled, the modem will then attempt to register the
new one.
Note that CDPD credentials are associated to the table entries. You cannot re-arrange the NEIs in
the table without resetting credentials with your cellular service provider.
5.2.1.1. NEI Configuration With AT Commands
To store the NEI and related CDPD activation parameters using AT Commands enter the
following commands (the AT is omitted for brevity):
1. +WPNEILIST to display the NEI table and indicate if one is registered. The auto-register
NEI is indicated with an asterisk (*) but the active NEI is not indicated.
2. +WS197=n where n is the entry you wish to edit (1 through 4). This will make it the active
NEI.
3. +WPNEI=ip where ip is the NEI address to assign. You do not need leading 0s in the
individual elements of the address. When you press <enter> the modem will respond with a
prompt to confirm the change in the table. The old and new values are both shown.
Press Y (case insensitive) to confirm the change, or
Press N (or any key other than Y) to cancel the command.
The modem will respond with OK if the NEI is in a valid IP form.
4. +WPNEILIST to display the list and verify the new entry.