Privacy Timeout
If “privacy timeout” is enabled and a port goes into privacy timeout, the port
becomes idle, the SLSS will send a forced disconnect (COD) to the offending port,
hang up the incoming (C.O.) telephone line to enable other ports to receive calls,
and light the Alarm LED until the offending device is returned to the on hook
condition.. This happens after the SLSS first detects at least five seconds of Central
Office dial tone or two cycles of either busy or reorder tone during the first 15 seconds of
off-hook, and no DTMF digits and 5 or fewer rotary breaks dialed in 30 seconds.
If dial tone, busy, or reorder were not detected, or dialing was detected, the SLSS
will monitor for either a switchhook flash, dial tone, or forced disconnect. If a
switchhook flash or forced disconnect is then detected, the SLSS will re-start the
privacy timeout period. No tones are sent to the off-hook phone. Incoming calls
to other ports (transfer code received from the Polling Controller) are routed
appropriately; calls to the off-hook privacy phone are given busy tone.
If the port is returned to on-hook and then goes off-hook later, it will receive
Central Office dial tone per normal operation.
Port Off-hook Timeout at the SLSS
If a call exceeds the maximum call length programmed with command
∗
10#y#n#,
it will be disconnected. To continue using the single Central Office line during
these conditions, a programmable off-hook timeout is provided. When the Port
Off-hook Timeout begins, the SLSS will send a forced disconnect (COD) to the
offending port, hang up the incoming (C.O.) telephone line, and the alarm LED
will light until the device on the port goes on-hook. This off-hook timeout should
allow enough time for the expected duration of the longest polling call.
Ring Detect
For most applications, use the default setting, 0. Change the ring detection setting
to 1 only if you are using a line isolator that does not comply with Bellcore
specifications for ringing signaling. After programming *77#1#, the SLSS will
answer the call between 300 - 400 ms after start of the first ring.
Auxiliary Relay
If you have an M-395-B, M-395-D, M-395-E, M-396-B, M-396-D, or M-396-E
model, your SLSS includes a latching Auxiliary Relay. If a modem or other
microprocessor-controlled device locks up, this relay can be closed/opened or it
can be pulsed closed for ten seconds to activate an external latching relay. The
latching relay can in turn be used to cycle power to or reset the offending device(s)
in the substation.
Though the Auxiliary Relay will carry 125 VDC at up to 1 Amp, or 120 VAC (E
model 220 VAC) at up to 3 Amps, it is designed to be used with an external
latching relay to effect the power switching.
The default Auxiliary Relay position is open and the default access mode is Secure
Mode (see Table 2, page 21). You can access the relay locally in Secure Mode from
Reference Manual
Chapter 6: Standalone SLSS Operation and Features
40-400-00031, Rev. A
Page 43