DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127 Issue 1
August 1997
Maintenance Object Repair Procedures
Page10-343DATA-BD (Network Control Circuit Pack)
10
DATA-BD (Network Cont rol Circuit
Pack)
The TN777 or TN777B Network Control circuit pack contains the followin g
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 hard ware
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 Reliab ility 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 di fferent
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 co mmands. 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