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40-400-00022 Rev. B
7
Emergency Interrupt Input
When an AC or DC voltage is applied to this input, located on the rear panel,
the unit will terminate an on-going transfer by dropping DTR to the modem
port. The unit sends a configuration string to the modem to prepare it for the
next call. The configuration string is user programmable. The Interrupt
feature is disabled in the factory default setting. It allows the user a means to
remotely abort a lengthy data transfer when another operation is desired.
Users can apply DC voltage through auxiliary relay on “B” version of
Teltone’s Substation Line Sharing Switch, (SLSS - must be on another
central office line), through a SCADA system or other intelligent device.
No Priority
In this mode, no port will be able to interrupt a data transfer on another port.
No Priority is the default factory setting.
Total Priority
In this mode, User Port 1 is the highest priority port. If another User port is
active, its activity will be terminated to allow User port 1’s request to be
serviced. User port 2 has the second highest port priority. User port 8 has
the lowest priority. When a higher priority port interrupts a data transfer, the
unit will not initiate any action to reestablish the original transfer.
Data Routing
Incoming traffic is initiated when the DS-100 sees carrier detect go active on
the Modem input port. When incoming traffic arrives at the modem port,
(modem must be configured for auto-answer) the unit may expect to receive
an access password followed by a routing command (transfer code). If the
command is successful, the modem port will be logically connected to the
specified User port. The modem can be programmed from the Local Mainte-
nance port.
Transfer Data Connection to Another User Port
When there is a pause in data flow into the Modem port, the unit will monitor
the next set of characters to see if they are a valid data switch command. If
the string is valid and of correct length, the Modem port will be logically
connected to the newly selected User port. If the string is not valid, the unit
will forward the string to the currently selected User port. The required
pause duration is programmable in 0.1 second increments. Factory default is
>1.0 second.
Outgoing Traffic, Data Switch Idle
The unit expects either DTR or RTS to go active as a request for service.
The unit is programmable to select which of these signal(s) will be consid-
ered a request for service. The unit will respond by logically connecting the
requesting device to the Modem port.