92 DID Trunk Cartridge wiring chart
DID supervisory signaling
Allowing this equipment to be operated in a manner that does not
provide for proper answer supervision signaling, as outlined
below, is in violation of FCC Part 68 Rules, and may be in
violation of local tariffs.
This equipment is designed to return supervisory signals to the
Public Switched Telephone Network (PSTN) when the DID calls
are:
answered, by the called station
answered by the attendant
routed to a customer controlled recorded announcement
routed to a dial prompt
This equipment is designed to return supervisory signals on all
DID calls forwarded through the system back to the PSTN within
20 s of the call forwarding sequence being initiated.
Emergency transfer conditions
Every DID Trunk Cartridge has a Control Circuit Interface
which should be connected directly to the Central Office for
monitoring purposes.
If the
system loses power or the microcontroller on the
DID Trunk Cartridge malfunctions, the CCI signals the Central
Office that it can no longer handle DID calls. The Central Office,
by pre-arrangement, can then forward the DID lines to other
numbers.
The CCI signaling to report power loss or malfunction of
the DID Trunk Cartridge is not supported by all carriers.
For carriers or installations which do not use CCI
signaling, the CCI and ET connections should be treated
as “No connection”.
Modular
Installer Guide
Содержание DR5
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