User`s guide

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4 GSM module. This type uses a GSM module for transmission of
messages. It is connected to the iSeries through a V.24 line, and
supports both outgoing and incoming messages and alarm calls.
5 GSM module. This type uses a GSM module for transmission of
messages. It is connected to the iSeries through a W&T TCP/IP
Communication server. This configuration supports both outgoing
and incoming messages and alarm calls.
6 TCP/IP. Direct connection to the GSM operator using TCP/IP. This
connection type supports outgoing and incoming messages.