AT&T DEFINITY 7100 series Manuel d'utilisateur télécharger pdf (Page 71)

CONTROL CIRCUIT PACKS

Switch Node Interface TN573 (G3rV2)

Terminates a fiber-optic link from a Switch Node Interface (SNI) in a

switch node to:

●

SNI in another switch node carrier

El in a PPN

EI in an EPN

System Access and Maintenance TN1648

(G3rV2)

The TN1648 is an SPE component used for system maintenance.

A processor on the TN1648 runs control routines that connect to

maintenance software running on the RISC processor.

The TN1648 has two EIA-232 interfaces: one for the administration

terminal and, when there is duplication, one for a terminal con-

nected to the off-line processor.

The TN1648 has the following attributes:

●

Connection to G3-MT for system administration

Alarm monitors and outputs

Power supply controls

Reserve power monitors

Emergency Transfer control

Sanity timer for SPE software sanity

Time-of-day clock used for application software and

time-stamping

Alarm panel

Connects to and terminates one end of the processor-

multiplexed bus

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AT&T DEFINITY 7100 series Manuel d'utilisateur Page 71