12 CM-TB8T Telephone Hybrid Expansion Card
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Auto Answer:
This option automatically answers an incoming telephone
call after 2 rings. For double cadence ring tones, both rings in the cadence
pattern are counted.
Auto Disconnect:
This option enables automatic call disconnection. K-break,
line polarity reversal and dial tone disconnect modes are supported. The
auto disconnect mode is defined by the country code selection.
Receive Gain:
This trim control adjust the level of the signal from the
telephone line in 3dB increments from -6dB to +6dB.
Transmit Gain:
This trim control adjust the level of the signal routed to the
telephone line in 3dB increments from -6dB to +6dB.
Country Code Setting:
This setting configures the telephone interface in
the CM-TB8 for the selected country or equipment type. It ensures that all
telephone approval parameters are met for operation in various parts of
the world.
Edit Settings:
This option shows the current telephone interface parameters
and allows them to be set manually. This is not required for normal
operation and should only be done with settings provided by Sonifex Ltd.
Modifying these parameters could make the telephone interface unstable.
PSTN Telephone Interface Connection Details
Telephone Line – RJ11 Socket
Pin 1: N/C
Pin 2: Earth Recall
Pin 3: Telephone Line A
Pin 4: Telephone Line B
Pin 5: Ringer
Pin 6: N/C
Note:
When not used in the UK, connect pins 3 and 4 only for correct
operation.
Telephone Handset – RJ11 Socket
The connection details are the same as for the telephone line connector.
