Avaya Definity SI, Maintenance Manual, Page: 2016 / 2968

Maintenance Object Repair Procedures
555-233-123 10-1230 Issue 4 May 2002
PI-LINK (Processor Interface Link)
NOTE:
Reference lnk-no using the display communication-interface links
command.
The Processor Interface (PI) Communication Link is the physical link that
connects DEFINITY to an adjunct such as AUDIX, another node in a DCS
network, or an ISDN-PRI connection. These links are either X.25 (DCS, AUDIX, or
MIS) or ISDN (ISDN-PRI). The system supports up to four of these links per
TN765 Processor Interface circuit pack. PI-LINK maintenance actually monitors
several hardware devices: Processor Interface ports, TN754 or TN784 Digital Line
ports, PDMs, TDMs, MTDMs, MPDMs, and DS1 facilities. Henceforth, “data
module” refers to either PDM, TDM, MPDM, or MTDM. In much of the following
link documentation, the repair procedures described mention various
hardware configurations. Choose the procedure appropriate to your
configuration.
The Processor Interface circuit pack provides an EIA connection. This connection
can be administered only on Link 1 in a system without High or Critical Reliability.
The EIA port is used when an adjunct (AUDIX, for example) is near (less than 25
feet) or further if a modem is used. The EIA port can also be used to connect two
PBXs together via DCS. The EIA port cannot be used in a High or Critical
Reliability system.
The Processor Interface Link can be in three different states. These states can be
seen using the status link lnk-no system technician command. If the link is in a
maintenance busy state, then the system technician had instructed the Processor
Interface to be in maintenance busy by entering the busyout link lnk-no
command or the Processor Interface Link is not established and maintenance is
trying to bring it up. This probably means that an error condition is occurring
somewhere on the link that keeps the link from being logically connected and
carrying data. If the link is busied out, then it can be put back into service by
issuing a release link lnk-no command. This restarts the link. If the link is for
DCS, then it may speed the recovery of the link if busyout link lnk-no and
release link lnk-no are executed on the switch that is establishing the connection
(see the Communication-Interface Links form). The link can be in a disconnected
state if the link cannot be started up. In this case, maintenance tries to establish
the link periodically. If the link is up and data is being sent successfully, then the
link is in the in-service state.
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run Full Name of MO
PI-LINK MAJOR test link lnk-no l Processor Interface Link
PI-LINK MINOR test link lnk-no l Processor Interface Link
PI-LINK WARNING test link lnk-no l Processor Interface Link