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Page 474 of 536 Chapter 25 — Fault locating and clearing
553-3121-210 Standard 3.0 January 1999
Clearing Common Equipment faults
Common Equipment faults
Common Equipment (CE) functions perform system control and switching.
Common Equipment, located on the NTMW01 SSC card, can include:
• CPU: Comprised of two processors. The main processor handles call
processing, serial ports, and network traffic. The auxiliary processor
handles card polling, power monitoring, tone generation, and control of
a Digital Signal Processor (DSP) for tone detection.
• Fiber Expansion Daughter Board: provides 16 additional conference
channels and access to expansion cabinet hardware
• Software Daughter Board: provides system software storage
• Ethernet controller: provides one port between the CPU and a Local Area
Network (LAN)
• Serial Data Interface: provides three ports between the CPU and external
devices
• Personal Computer Memory Card Industry Association (PCMCIA)
interface: provides access for one Type III or two Type II PCMCIA card
drives to allow software delivery or customer data storage
• Tone and Digit Switch: provides 30 channels of tone generation
• Conference: provides 32 channels, plus 16more if the Fiber Expansion
Daughter Board is equipped
Common Equipment faults can disable the CPU and stop call processing. In
addition, other types of equipment (such as Peripheral Equipment) may not
operate properly while there is a CE fault in the system.
Fault clearing procedures
Table 70 lists Common Equipment (CE) fault indications. To clear faults,
select the symptom listed in this section that most resembles the fault
indications and go through the procedure for clearing each possible cause
until the fault is fixed. Once the fault is corrected, disregard the remaining
possible causes.
Clear any power faults before attempting to clear Common Equipment faults.