NEC ELECTRA ELITE IPK II, Руководство по аппаратному обеспечению системы, Страница: 623 / 642

Electra Elite IPK II Document Revision 3
System Hardware Manual 14 - 11
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No Outside Dial Tone Access
Multiline
Terminal or SLT?
SLT
Check for Internal
Dial tone.
Check for Internal
Dial tone.
Internal
Dial Tone?
Internal
Dial Tone?
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
1. Perform Second
Initialization.
2. Reset and test
SLI(4)/(8)-U10 ETU.
3. Replace and test
SLI(4)/(8)-U10 ETU.
1. Reset terminal
and test.
2. Replace terminal
OR
Reset ESI(8)-U10
ETU and test.
3. Replace ESI(8)-U10
and test.
Leave an SLI(4)/(8)-U( )
ETU and an ESI(8)-U( )
ETU installed. Go to
Flowchart A1.
All
Terminals
affected?
Check for Internal
Dial tone.
Internal
Dial Tone?
Go to Flowchart
A1.
Test for CO dial
tone at MDF with
test set, and check
CO wiring.
Have Telco
check lines.
1. Check PRG 21-04 and 14-01-07 for
Station Restriction.
2. Check PRG 15-06 for Trunk access.
Check SW 1~8 on COI(8)-U10
ETU for proper switch setting.
Check conduit and frame ground to
system for ground start trunks.
CO
Dial Tone?
1. Reset and test; replace COI(8)-U10 ETU and test. If trouble persists go to step 2.
2. Perform Second Initialization. If trouble persists go to step 3.
3. Perform First Initialization. If trouble persists go to step 4.
4. Replace CPUII( )-U( ) ETU, and test using default program.
C3
Both