4-8
Peripheral Cards and Components
Chapter 4 - Maintenance and Troubleshooting
CO Line Card Functions
The Loop Start CO Interface Board provides loop start line interface from the Public Telephone
Network to provide ringing and loop start flash.
PRIB/BRIB ISDN and T1IB are digital CO interface boards.
Table 4-5: Loop Start CO Interface Board (LCOB)
Problem
Possible Solutions
6 or 8 Loop Start CO lines on the
system are not working …
Check wiring.
Try a replacement LCOB to identify if card
is defective.
Check programming.
CO Line(s) are not ringing …
Check CO Line Ring Assignment in
programming.
Noise or Crosstalk on the line. (CO
Line checks fine at demarcation
point with system isolated) …
Check whether CO lines are bundled too
tightly.
Try a replacement LCOB to identify if card
is defective.
CO Button not working …
Check wiring.
Check programming of CO lines.
Table 4-6: PRI/BRI ISDN and T1
Problem
Possible Solutions
Popping, crackling, dropped calls,
or one-way transmission …
Verify the following settings and
connections:
The LD1 on the MPB is lit.
The clock source switch on the LMU1 is
set correctly for the external clock
source being used.
The clock cables are connected
correctly.
The clock switches on the BRIB/PRIB/T1
are set correctly.
Содержание STARPLUS Triad XTS
Страница 1: ...STARPLUSTM Triad XTS Installation...
Страница 10: ...N O T E S...
Страница 20: ...1 12 Product Description Chapter 1 Introduction...
Страница 22: ...N O T E S...
Страница 36: ...N O T E S...
Страница 41: ...KSU Installation 3 7 Chapter 3 System Installation Figure 3 3 Connecting Cabinet 0 and Cabinet 1...
Страница 42: ...3 8 KSU Installation Chapter 3 System Installation Figure 3 4 Mounting Cabinets 0 1 2 48 3...
Страница 77: ...CO PBX Connections 3 43 Chapter 3 System Installation Figure 3 25 Case 2 of Clock Chain...
Страница 79: ...CO PBX Connections 3 45 Chapter 3 System Installation Figure 3 27 Case 4 of Clock Chain...
Страница 82: ...3 48 Station Connections Chapter 3 System Installation Figure 3 28 Electronic Telephone Interface Board ETIB...
Страница 104: ...N O T E S...
Страница 134: ...4 32 VOIP Maintenance and Troubleshooting Chapter 4 Maintenance and Troubleshooting...
Страница 138: ...iv Index...