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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1092PKT-CTRL (Packet Control Circuit Pack)
10
PKT-CTRL (Packet Control Circuit
Pack)
!
CAUTION:
A detailed flowchart for isolating and resolving Packet Bus faults is included
in Chapter 9, ‘‘
Packet Bus Fault Isolation and Correction’’. This flowchart,
along with the other information presented in the chapter, can help in
resolving problems that are not isolated to the Packet Control. Whenever
the repair procedures for this Maintenance Object refer to Packet Bus
and/or Packet Control maintenance, be sure to reference Chapter 9 in
addition to the MO documentation for Packet Bus.
The TN778 Packet Control circuit pack is the hardware component that serves as
the interface between the SPE and the Packet Bus. It terminates the Link Access
Procedure D (LAPD) protocol and provides support for thousands of signaling
links. As shown in Figure 10-79
, a Packet Control link generally terminates on the
Packet Control circuit pack and a packet endpoint which is connected to a
Packet circuit pack. An ASAI adjunct is an example of a packet endpoint, and a
TN556 is an example of a Packet circuit pack. In G3iV1.1-286 or G3iV2-386, the
following Packet circuit packs (packs that can connect to the Packet Bus) are
available:
■ TN556 ISDN-BRI Line Circuit Pack
■ TN570 Expansion Interface Circuit Pack
■ TN771 Maintenance/Test Circuit Pack
■ TN778 Packet Control Circuit Pack
1. If the specified Packet Control circuit pack is in the active SPE, it must first be busied-out via the
busyout packet-control C command. After testing has completed, the Packet Control circuit
pack should be released from the busyout state via the release packet-control C command.
2. Where C is the carrier designation (A or B) and should be specified only in a High or Critical
Reliability system.
MO Name (in
Alarm Log) Alarm Level Initial Command to Run Full Name of MO
PKT-CTRL MAJOR reset packet-control C
1
Packet Control Circuit Pack
PKT-CTRL MINOR test packet-control C
2
Packet Control Circuit Pack
PKT-CTRL WARNING release packet-control C Packet Control Circuit Pack