3-14 NT5K19 Analog Tie Trunk Card
553-3001-173 UK Trunk cards description
Figure 3-1
Recorded announcement - start mode
GND
Open
Control Pulse
from RAN machine
Announcement Duration
GND
Open
150 ms
Start Pulse
from Meridian-1
Continuous mode
The requirements for continuous mode announcement machines are as
follows:
•
an impedance of 4 ohms or less
•
generation of a control pulse (150 - 300 ms) at the start of the
announcement period
•
default signal level of -9dBm (in 600
Ω
) adjustable to a level of 10
dBm.
The announcement machine may provide a separate busy signal when the
machine is recording or erasing a message or if the machine is
malfunctioning. The busy signal will be used by the Meridian 1 for
maintenance purposes.
Figure 3-2 shows recorded announcement in continuous mode.
United Kingdom
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