Maintenance strategy
Maintenance testing
24
Maintenance Procedures
December 2003
Most MOs are individual circuit packs such as the:
•
Direct Inward Dial Trunk circuit pack (DID-BD)
•
DS1 Tie Trunk circuit pack (TIE-DS1)
•
Expansion Interface (EI) circuit pack (EXP-INTF)
Some MOs represent hardware components that correside on a circuit pack. For example, the following
circuit packs have the listed circuits residing on them:
•
IP Server Interface circuit pack (IP-SVR) — Packet Interface (PKT-INT), IP Server Control
(IPSV-CTL), Enhanced Tone Receiver (ETR-PT), TDM bus clock (TDM-CLK), Tone Generator
(TONE-PT), and Tone-Clock (TONE-BD)
•
S8700 MC
Tone-Clock circuit pack (TONE-BD) (found in non-IPSI-connected port networks
only) — TDM bus clock (TDM-CLK) and Tone Generator (TONE-PT).
Other MOs represent larger subsystems or sets of monitors, such as an expansion port network (EXP-PN)
or a cabinet’s environmental sensors (CABINET).
Finally, some MOs represent processes or combinations of processes and hardware, such as
synchronization (SYNC) and duplicated port network connectivity (PNC-DUP). The previous
abbreviations are maintenance names as recorded in the error and alarm logs. Individual copies of a given
MO are further distinguished with an address that defines its physical location in the system. These
addresses, along with repair instructions and a description of each MO appear alphabetically in
Maintenance Alarms Reference (555-245-102).
Maintenance testing
Maintenance testing can reduce most troubles to the level of a field-replaceable component (usually a
circuit pack). The affected circuits can be identified by:
•
LEDs on the circuit packs
•
Reports generated by the system software
Background testing
The background maintenance tests in the system are divided into three groups:
•
Periodic tests:
— Usually performed hourly by maintenance software
— Nondestructive (not service-affecting)
— Can be run during high-traffic periods without interfering with calls
•
Scheduled tests:
— Usually performed daily
— More thorough than periodic testing
— Destructive (service-affecting)
— Run only during off-hours to avoid service disruptions
Summary of Contents for CMC1
Page 1: ...Maintenance Procedures 555 245 103 Issue 1 1 December 2003 ...
Page 14: ...Contents 14 Maintenance Procedures December 2003 ...
Page 416: ...Additional maintenance procedures IP Telephones 416 Maintenance Procedures December 2003 ...
Page 426: ...Index X 426 Maintenance Procedures December 2003 ...
