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 10-383DATA-CHL (Network Control Data Channel)
10
■ Establishment of a connection over which to log CDR data to a printer or
other storage unit. This connection is called PRI-CDR/SEC-CDR (PRI-CDR
Link).
■ Establishment of connection(s) over which to log PMS, Automatic
Wakeup, and Emergency Access to Attendant data to a Journal printer.
This connection is called PMS-PRINT/JRNL-PRNT (PMS Printer Link).
■ Establishment of a connection to a customer-owned PMS. This connection
is called the PMS-LINK.
■ Establishment of a connection to system printer. This connection is called
the System Printer Link (SYS-PRNT).
■ Establishment of connection(s) for up to two secondary administration
terminals.
■ Saving announcements from the ANN-BD (Announcement Circuit Pack) to
tape.
■ Restoring announcements from tape to the ANN-BD (Announcement
Circuit Pack).
■ Maintenance testing of the DATA-CHLs and DATA-CON.
From the viewpoint of administration, the four DATA-CHLs on a Network Control
circuit pack are numbered 01 through 04. In a system with a single SPE or in the
Active SPE of a system with High or Critical Reliability, each DATA-CHL may be
assigned a unique extension using the add data-module [ <ext> | next ]
command. These extensions are called
active extensions. When assigning an
active extension to a DATA-CHL XX (where XX is 01, 02, 03, or 04) the Add
Data-Module form also requires the user to assign a unique
maintenance
extension to the corresponding Standby SPE DATA-CHL XX. The maintenance
extension is required even when the system does not High or Critical Reliability;
that is, even when there are no Standby SPE DATA-CHLs. In a High or Critical
Reliability system, a Standby SPE DATA-CHL is tested by using its maintenance
extension to identify it.
NOTE:
If a DATA-CHL or the DATA-CON becomes defective on the Network
Control in a system with a single SPE, the Network Control circuit pack
cannot be replaced without powering down the system.
Figure 10-24 illustrates the logical decomposition of DATA-CHL (Network Control
Channel) and the DATA-CON (Network Control Driver) into software and
hardware components. The figure also shows the interface to the switch software
via the memory bus and to terminal equipment via the TDM Bus and port circuit
packs.
As indicated in the figure, DATA-CHLs 1 and 2 share a common Dual Port RAM
(DPR) and TDM Bus interface hardware, and DATA-CHLs 3 and 4 share a
common DPR and TDM Bus interface hardware. Thus, if DATA-CHL 1 is
defective, then DATA-CHL 2 is likely to be defective and vice versa. Similarly, if