Specifications

TN792 duplication interface
Issue 6 February 2007 241
TN792 duplication interface
Note:
Note: This circuit pack is no longer sold.
In a high reliability or critical reliability DEFINITY SI system, a duplication interface copies the
contents of memory from the primary Switch Processing Element (SPE) to a standby SPE.
Therefore, the standby SPE can take over immediately when the former fails. The TN792
duplication interface (DUPINT) uses the Enhanced M-Bus of the DEFINITY SI TN2404
processor for this memory shadowing function. The Enhanced M-bus supports 32-bit
addressing and data access (versus 16-bit for the M-bus). In this case, the Enhanced M-bus
transfers data faster and shadows a larger area of memory than the M-bus. The M-bus is still
supported.
You need two TN792 circuit packs, one for the primary control carrier and one for the standby.
You can replace TN772 duplication interfaces with TN792s, but you must replace them in pairs.
A TN772 circuit pack cannot communicate with a TN792 circuit pack.
A duplex optical cable connects the TN792 circuit packs. This cable eliminates the additional
electromagnetic emissions that otherwise results from the doubled data rate on the bus. The
optical cable interface to the new DUPINT is on the front faceplate of the circuit pack.
The TN792 circuit pack is compatible with existing duplication cables.
TN793CP analog line with Caller ID for multiple countries
(24 ports)
The TN793CP is an analog line, 24-port circuit pack that supports caller ID telephones and
caller ID devices that conform to Bellcore Standard GR-30-CORE, Issue 2, and
Bellcore-compliant signaling using V.23 Frequency Signal Keying (FSK). This means that the
TN793CP supports caller ID devices in the U.S. and most other countries. Each port can
support one of the following:
● Analog telephone, such as a 2500 telephone (DTMF dial)
● Answering machine
● FAX
● Loop-start CO port (used for INTUITY AUDIX Messaging)