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Chapter 5: Polling Controller and SLSS Operation/Features
If you are installing the SLSS, please return to Where To Start in Chapter 1 after
reading this chapter.
Basic Operation
When installed and working as a system, the SLSS and Polling Controller
communicate across the public switched telephone network (PSTN) or a utility’s
private telephone network to set up and disconnect calls, as well as to determine
priorities among devices and types of calls. For example: outgoing emergency
calls from the substation take priority over polling calls.
The SLSS answers incoming calls, determines which port should get the call, and
routes the call accordingly.
If a transfer code is received from a Polling Controller, the SLSS routes the call to
the requested device, such as a polled modem. If no transfer code is received, the
call is routed to the default port (Port 1 is the factory default) which is usually
connected to a telephone. If no default port is defined, calls without transfer codes
are disconnected.
You can select a variety of SLSS operations by programming the unit remotely or
locally (on-site) using a touchtone telephone.
The SLSS can be used with or without a Polling Controller. However, Teltone highly
recommends that the SLSS be used with a Polling Controller. When used without a
Polling Controller, the caller must be sure the SLSS answers the call before transfer
codes are sent to route the call.
Figure 5 Polling Controller and SLSS Operation
Reference Manual
Chapter 5: Polling Controller and SLSS Operation/Features
40-400-00031, Rev. A
Page 25