8
40-400-00022 Rev. B
Outgoing Traffic, Data Switch Active
If there is a request for service and the unit is set to No Priority default, and
the unit is active on another User port, the unit will not respond to the request
until it is idle. If the unit is set for Total Priority, and a higher priority port
requests service, the unit will abort the current transfer, drop DTR to the
Modem port, and wait until the Modem port is ready for a new transfer.
When the unit is ready to support the next call, it will logically connect to the
Modem port.
Disconnect Procedure
Incoming calls are disconnected when DCD goes inactive on the Modem
input port. Outgoing calls are disconnected when DTR or RTS (whichever
was used to originate the call) goes inactive. When either the Modem input
port or active User port has their control lines go inactive, the unit will go idle.
Data Transfer Inactivity Time-out
The Data Transfer Inactivity time-out can be set between 1 and 10 minutes in
1 minute intervals. The default time-out is 3 minutes. The user can also
program the unit for no activity time-out.
Loss of Power
The unit will be totally inoperative when powered down. The only output will
be an alarm contact closure.
Version 2.00 Upgrade
The Version 2.00 upgrade adds the following features:
•
expanded modem initialization string from 25 to 50 characters
•
up to 64 port expansion using a single transfer code (cascading)
•
site Sign On message operation
•
case sensitive transfer code operation
•
default port operaton
•
port rollover operation
•
reconnect to last accessed port operation
•
port time-out alarm enable/disable
AC Power
Teltone part numbers 250-00204-05 (DS-104) and 250-00204-06 (DS-108)
and later are properly labeled for 90 - 120 VAC power use. Earlier models
are also able to operate with AC power, but are not correctly labeled. Refer to
Figure 7 for AC connections.