TLS-3A-01 Telephone Line Simulator 7
Dial any eleven-digit number One long ring
starting with 1 or 0 (Line 1 rings two seconds on,
four seconds off)
When the other telephone rings, lift the handset to answer. The two
telephones are now connected.To break the connection, hang up either
telephone.
A dialing error occurs when less than 7 digits are dialed or if the first
digit is a 1 or 0 and less than 11 digits are dialed. The TLS-3A will
issue a reorder tone (aka Fast Busy) approximately 8 seconds after the
last DTMF digit is entered if a dialing error occurs.
Forced Disconnect
Either party can break a connection by hanging up the telephone
(going “on-hook”). The TLS-3A will provide dial tone to the telephone
still off-hook. If the called party goes back off-hook within two seconds,
but the calling party remains off-hook, the TLS-3A will reestablish the
connection. After the called party is on-hook for two seconds, the TLS-
3A will issue a COD (cut-off on disconnect) signal to the calling party.
Calling Party Supervision
The U.S. telephone network typically uses Calling Party Supervision,
meaning that even though the called party hangs up, he may be
reconnected to the calling party when the phone is taken off-hook
again.The calling party must hang up for the called party to be fully
disconnected before initiating a new call.The telephone network will
timeout and disconnect the call within 5-20 seconds, giving the called
party dial tone when he goes off-hook again.
The TLS-3A will issue a COD signal to the called party two seconds
after the calling party goes on-hook for a valid on-hook time of 350
milliseconds. If the calling party goes off-hook again, the caller will hear
silence until all other actions are complete.
Ring Down Operation
In addition to using the dialed numbers, it’s also possible to send a
continuous ringing signal from one telephone to the other. Follow these
steps to send a ring down signal:
1. Lift the handset on the telephone set from which you want to origi-
nate the call.
2. Press the button.The other telephone will ring as long as you
hold down the button.
Demonstrating and Testing Equipment
To demonstrate or test telephone equipment, connect the instruments
to Line 1 and Line 2.The equipment will work through the TLS-3A
exactly the same way it works through the public telephone network.
