User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-377DATA-BD (Network Control Circuit Pack)
10
DATA-BD (Network Control Circuit
Pack)
The TN777 or TN777B Network Control circuit pack contains the following
objects: the SW-CTL (Switch Control), four DATA-CHLs (Network Control Data
Channels), the DATA-CON (Network Control Driver), and the generic hardware
that interfaces with the TDM Bus (that is, DATA-BD). The generic hardware
DATA-BD is described here.
All circuit packs that have an interface with the TDM Bus have a common set of
generic hardware that provides the TDM Bus interface. Consequently, these
circuit packs share a common set of tests that verify the integrity of the generic
hardware. The circuit packs and common set of tests that they share are
described in XXX-BD (Common Port Circuit Pack) Maintenance documentation.
Because the Network Control circuit pack has this common set of hardware, it is
classified in the XXX-BD Maintenance documentation as a service port circuit
pack.
A DEFINITY system with a single SPE has a single Network Control circuit pack.
A High or Critical Reliability system has two Network Control circuit packs: one
that resides in the Active SPE control carrier, and one that resides in the Standby
SPE control carrier. Refer to Chapter 6, "Reliability Systems: A Maintenance Aid",
and the STBY-SPE (Standby SPE) Maintenance documentation for a description
of High and Critical Reliability systems.
Because the Network Control circuit pack is a SPE circuit pack, it has two
important characteristics that make maintenance on the DATA-BD MO different
from the maintenance on other XXX-BD (Common Port Circuit Pack) MOs. First,
because the Network Control circuit pack has the SW-CTL (Switch Control) on it,
it must always be physically installed in the system. Therefore, the DATA-BD MO
is always logically administered. Second, because the Network Control circuit
pack is a SPE circuit pack, it has no PCSS designation. Therefore, the DATA-BD
MO cannot be accessed by system technician via the test board PCSS, reset
board PCSS, busyout board PCSS, or release board PCSS commands. The
only system technician access to the DATA-BD MO is via the test
network-control [a | b] [short | long] command.
MO Name (in
Alarm Log) Alarm Level Initial Command to Run Full Name of MO
DATA-BD WARNING test network-control Network Control Circuit Pack
DATA-BD MINOR test network-control Network Control Circuit Pack
DATA-BD WARNING test network-control Network Control Circuit Pack