DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-699DUP-CHL (Duplication Interface)
9
DUP-CHL (Duplication Interface)
The Duplication Channel (DUP-CHL) maintenance object tests both UN330B
Duplication Interface circuit packs and the interconnecting cable. These tests, as
a group, test end-to-end functionality. That is to say, software on the standby and
the active as well as both duplication circuit packs and their cabling must be
operational to some degree for these tests to PASS or FAIL. Otherwise, they will
ABORT. Tests that fail are recorded in the error and alarm log as errors/alarms
against the standby SPE. No errors/alarms are recorded against the active SPE
for this maintenance object.
Duplication Interface Functions
The Duplication Interface is comprised of two UN330B circuit packs, one in each
of the duplicate SPE carriers, connected by a single Duplication Interface cable.
The circuit packs and cable provide the following functions to support SPE
duplication.
■ Memory Shadowing
Every write to memory made by the active SPE is also written into the
standby SPE memory. Only those memory writes to addresses that lie
within certain address boundaries, as defined by memory bounds
registers on the Duplication Interface circuit packs, and other qualified
writes are shadowed.
■ SPE Communication
Software running on the active SPE communicates with software on the
standby SPE by sending and receiving information via the two way,
general purpose mailbox mechanism provided by the circuit packs.
■ Manual SPE Locking
The Duplication Interface Circuit packs monitor the relative
states-of-health of the two SPEs, and control selection of active/standby
status for them.
■ SPE Selection
The SPE-Select switches on the Duplication Interface circuit packs can be
used to lock the active SPE and prevent interchanges. See STBY-SPE for
instructions.
MO Name (in Alarm
Log)
Alarm
Level Initial Command to Run Full Name of MO
DUP-CHL MAJOR test duplication-interface l c Duplication-Interface
DUP-CHL MINOR test duplication-interface l c Duplication-Interface
