10
The Interface Solution Experts
WLM
Main Menu Option (1): Set Baud Rate
The baud rate setting affects the interface between the radio and Ethernet sections of the modem. All of the settings
are factory set and should not be changed.
Main Menu Option (2): Edit Call Book
The Call Book is an innovative feature in the WLM that offers both security and flexibility in use. The Call Book
accomplishes this by allowing the user to determine with which other WLMs a given radio modem will communicate,
based on the call book numbers for both the master and remote. The radio modem’s call book number is encoded in
the microprocessor and identified on a label on the modem. The instructions provided in this section are for point-to-
point mode only. Use of the Call Book for multi-point systems is explained later in this chapter. For two WLM radio
modems to communicate in point-to-point mode, three events must occur:
1. The call book number for the master must be listed in the remote’s Call Book.
2. The call book number for the remote must be listed in the master’s Call Book.
3. The master must be programmed to call the remote.
As shown in figure 3, the Call Book allows users to set up a list of up to 10 WLMs to communicate with, designate
up to 2 repeaters to be used in communicating with a given radio modem, and tell the master which remote to call.
To direct the master to call a remote, the Remote must be in the Call Book Menu. A specific remote may be called
by entering (C) at the prompt, followed by the menu number corresponding to that remote. To call any available
remote in the list, the user should enter C and then A (for All).
Note:
To call a remote through one or two repeaters, you must call that remote directly (as opposed to
using the Call All option). When Call All is selected, the master is not able to connect with any remotes
through repeaters. This is because the master calls every remote in the list when instructed to call all and
will connect with the first remote to respond. When calling through a repeater, the master must first call that
repeater and establish a communications link with it prior to making contact with the remote.
Figure 3: Call Book Menu
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