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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 10-382DATA-CHL (Network Control Data Channel)
10
DATA-CHL (Network Control Data
Channel)
The TN777 or TN777B Network Control circuit pack contains the following
objects: the SW-CTL (Switch Control), four Data Channels, the Driver, and the
generic hardware that interfaces with the TDM Bus (that is, DATA-BD). The Data
Channels are the subject of this section. The Driver is also described.
Together, the four DATA-CHLs and the DATA-CON provide a data
communications interface that allows data terminal equipment connected to port
circuit packs to communicate with software applications running on the system.
The DATA-CON represents the interface to the control channel of the TDM Bus.
Each DATA-CHL represents a dial-up/dial-out asynchronous communications
port that interfaces to the TDM Bus. The DATA-CON supports the signaling
required to establish and tear down a connection between the terminal
equipment and a software application. Data is transported between the terminal
equipment and the software application over the connection established over the
DATA-CHL.
A system with a single SPE has a single Network Control circuit pack (DATA-BD).
Thus, there is single set of four DATA-CHLs. 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 descriptions of High and Critical Reliability
systems.
Network Control Data Channels (DATA-CHLs) may be used to support the
following features and functions:
1. The test data-module <ext> long command drops all sessions on all of the Network Control ports.
Refer to Data Channel Reset Test (#107).
2. <ext> is the extension of the Data Channel to be tested. The extension can be determined by
issuing the list data-module command from the administration terminal. The resulting form
provides a mapping from the 1CXXpp designation of the Data Channel to its corresponding
extension, where pp indicates which one of the four Data Channels is alarmed (01, 02, 03, or 04)
and C indicates the carrier on which the alarmed Data Channel resides (A for carrier A or B for
carrier B).
3. The test data-module <ext> long command drops all sessions on all of the Network Control ports.
Refer to Data Channel Reset Test (#107).
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run Full Name of MO
DATA-CHL
1
MINOR test data-module l <ext> Network Control Data Channel
DATA-CHL
2
WARNING test data-module sh <ext>
3
Network Control Data Channel