May 2001
System Hardware Manual
5 - 129
A6-32
400
0-6
42-0
1
–
R
e
le
as
e 4
.0
Ma
y 2
001
✆
CN1
Connects to the backboard
4.4
COI(4)-U( ) ETU
4.4.1
Description
The COI(4)-U13 (U19 for New Zealand) ETU provides an
interface with the Central Office. The COI ETU contains
circuitry for outside ring detection, holding, dialling and
control functions.
It also incorporates line reversal detection and busy tone
detection circuitry.
The COI(4)-U( ) ETU provides identical circuits to serve
up to four CO trunks that can be any combination of DTMF
and Decadic signalling. Refer to Figure 5-18 COI(4)-U( )
ETU.
4.4.2
Installation
A maximum of 16 COI(4)-U( ) ETUs can be installed in the
Xen Master system (maximum of 64 trunks) in slots
S1~S8 in the first, second or third KSU.
A maximum of 2 COI(4)-U( ) ETUs can be installed in the
Xen Axis system (maximum of 8 trunks) in slots S3 ~ S7.
4.4.3
Switch Settings
The Reset Switch resets the Unit.
Figure 5-18 COI(4)-U( ) ETU
Содержание Xen Master
Страница 1: ...System Hardware Manual NEC Australia Pty Ltd A6 324000 642 01 Release 4 0 May 2001...
Страница 37: ...May 2001 System Hardware Manual 2 19 A6 324000 642 01 Release 4 0 May 2001 Figure 2 1 System Block Diagram...
Страница 123: ...May 2001 System Hardware Manual 5 105 A6 324000 642 01 Release 4 0 May 2001 Figure 5 7 CPUB U13 ETU...