Nortel Circuit Card, Installation Manual, Page: 606 / 908

Page 606 of 906 NT8D14 Universal Trunk card
553-3001-211 Standard 3.00 August 2005
The Route Data Block LD 16 is used to configure a RAN route in
Multi-Channel Level Start/Control mode, using the following response:
RTYP = MLSS
Figure 139
RAN control signals (Control GRD = IDLE)
— Continuous operation mode —
C
ST+ input to announcer hardwired to ground
250 ms reset
Message
250 ms pulse at
end of message
ST+
— Pulse start/Level control mode —
C
250 ms pulse at
start of message
250 ms pulse at
end of message
250 ms pulse
starts message
Message plays
to completion
Intermediate ST+
pulses ignored
Start End
Message
ST+
C
250 ms pulse at
start of message
250 ms pulse at
end of message
Message output only
while ST+ is present
ST+ initiates and maintains
message output
Message
ST+
Play
Idle
Idle
Play
Play
Idle
Ground
Ground
Ground
Open
Open
Open
Open
Open
Open
Ground
Ground
Ground
(early disconnect) (disconnect after end of message)