Teltone m-392 Guida Utente
Any priority disconnection delay during a polling call will be minimized if the polling
modem “Loss of Carrier” disconnect time delay is set to a minimum acceptable duration.
This duration is called the Modem Disconnect on Loss of Carrier.
modem “Loss of Carrier” disconnect time delay is set to a minimum acceptable duration.
This duration is called the Modem Disconnect on Loss of Carrier.
Incoming Calls to the LSS
When the LSS is idle, the incoming central office line is disconnected from the internal
phone line. The LSS answers all calls at the end of the first ring period. It then monitors
for a routing code.
phone line. The LSS answers all calls at the end of the first ring period. It then monitors
for a routing code.
The Polling Controller recognizes the routing digits from the polling modem. As an
additional level of security, the Polling Controller converts the received routing digits to a
transfer code for transmission over the network.
additional level of security, the Polling Controller converts the received routing digits to a
transfer code for transmission over the network.
If no code is received by the LSS within 4 seconds after answer, ringing voltage is sent to
the programmed default port and audible ringback is sent to the calling party. If the
telephone is not answered in 1 to 30 rings (default programmed to 12 rings) or a forced
Disconnect is received from the central office, the LSS terminates ringing and goes
on-hook toward the central office.
the programmed default port and audible ringback is sent to the calling party. If the
telephone is not answered in 1 to 30 rings (default programmed to 12 rings) or a forced
Disconnect is received from the central office, the LSS terminates ringing and goes
on-hook toward the central office.
If a transfer code is received, the LSS sends ringing voltage to the appropriate port. The
LSS also generates a modem answer tone toward the Polling Controller, signaling call
progress. When the local modem answers, the LSS connects the local modem to the
central office lines. The Polling Controller then reconnects the polling modem to the
central office line and modem handshake proceeds normally.
LSS also generates a modem answer tone toward the Polling Controller, signaling call
progress. When the local modem answers, the LSS connects the local modem to the
central office lines. The Polling Controller then reconnects the polling modem to the
central office line and modem handshake proceeds normally.
Interrupted Incoming Call at the LSS
If a phone goes off-hook on Port 1 before an incoming call has been connected to a port,
the LSS connects Port 1 to the incoming call, and monitors for a DTMF string from the
Polling Controller. If a DTMF transfer code is received, the LSS will split the line. What
happens next depends on which priority interrupt mode has been programmed.
the LSS connects Port 1 to the incoming call, and monitors for a DTMF string from the
Polling Controller. If a DTMF transfer code is received, the LSS will split the line. What
happens next depends on which priority interrupt mode has been programmed.
If the LSS is programmed for No Priority, the call will be routed to the appropriate port,
and Port 1 will receive busy tone.
and Port 1 will receive busy tone.
If in Total Priority Mode, the LSS will perform a disconnect sequence as described
previously, and then connect the central office line to Port 1.
previously, and then connect the central office line to Port 1.
If in Emergency Priority Mode, the LSS will provide dial tone to Port 1, and the user
must dial one of the programmed emergency numbers to gain access to the central office
line. The LSS will not route the incoming call to the port selected by the transfer code until
either the caller is denied access due to dialing an invalid number, or 5 seconds after the
last digit dialed. This design will prevent any modem carrier from interfering with a
disconnect sequence if the caller dials a valid emergency number. If a valid emergency
number is dialed, the LSS will perform a disconnect sequence immediately.
must dial one of the programmed emergency numbers to gain access to the central office
line. The LSS will not route the incoming call to the port selected by the transfer code until
either the caller is denied access due to dialing an invalid number, or 5 seconds after the
last digit dialed. This design will prevent any modem carrier from interfering with a
disconnect sequence if the caller dials a valid emergency number. If a valid emergency
number is dialed, the LSS will perform a disconnect sequence immediately.
If off-hook is detected on a port other than Port 1, before an incoming call rings the LSS,
the incoming call is connected to the port. If the LSS has detected ringing, or has already
answered the incoming call, and any port other than Port 1 goes off-hook, the LSS will
keep the talk path split for 4 seconds while it monitors for CNG tone or a DTMF string
from the Polling Controller. If CNG or the expected DTMF transfer code is received, the
call is handled as described previously in the “Outgoing Calls from the LSS” section. If a
DTMF transfer code is not received, the call is routed to Port 1, and the off-hook port will
be left connected to the local battery feed. No tones will be sent to the port.
the incoming call is connected to the port. If the LSS has detected ringing, or has already
answered the incoming call, and any port other than Port 1 goes off-hook, the LSS will
keep the talk path split for 4 seconds while it monitors for CNG tone or a DTMF string
from the Polling Controller. If CNG or the expected DTMF transfer code is received, the
call is handled as described previously in the “Outgoing Calls from the LSS” section. If a
DTMF transfer code is not received, the call is routed to Port 1, and the off-hook port will
be left connected to the local battery feed. No tones will be sent to the port.
Reference Manual
Chapter 4: Teltone Default LSS Operation with Polling Controller
40-400-00015, Rev.
F
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