NEC Xen Master System Hardware Manual page 25

Equipment
Name
COI(8)-U13 This unit supports eight outside (CO/PBX)
lines and provides circuitry for ring
ETU
detection, holding, and dialling. Electrical
fuses (posistors) are built into this ETU.
COI(8)-U19
Only
ETU
supported.
The maximum quantity allowed depends
on the number of BRT(4)-U13 ETU,
PRT(1)-U13 ETU, COID( )-U13 ETU,
DID(4)-U13 ETU and/or TLI(2)-U13 ETU
installed.
number of trunk lines.
COI(4)-U13 As per the COI (8)-U13 ETU, however
only supports the connection of four
ETU
outside trunk lines.
COI(4)-U19
ETU
COID(8)-U13 The Central Office Caller ID ETU detects
Caller ID signals from the central office
ETU
and sends caller identification to the CPU
ETU.
COID(8)-U19
This Unit supports eight outside (CO/PBX)
ETU
lines and provides circuitry for ring
detection, holding, and dialling. Electrical
fuses (posistors) are built into this ETU.
The maximum quantity allowed depends
on whether a BRT(4)-U13 ETU, PRI(1)-
U13 ETU, COI( )-U13 ETU, DID(4)-U13
ETU and/or TLI(2)-U13 ETU are installed.
These units share the total number of
trunk lines. This ETU provides loop start
service only.
COID(4)-U13 As per the COID(8)-U13 ETU, however
only supports the connection of four
ETU
outside trunk lines.
COID(4)-U19
ETU
DID(4)-U13 The Direct Inward Dialling Interface Unit
supports four DID lines. Each DID(4)-U13
ETU
ETU requires one interface slot position in
the KSU.
☛
The maximum quantity allowed depends
on whether a BRT(4)-U13 ETU, PRT(1)-
U13 ETU, COI(8)-U13 ETU, COID(8)-U13
ETU,
installed.
number of trunk lines.
System Hardware Manual
Table 1-1 Equipment List (Continued)
Description
loop start, DTMF
These units share the total
Immediate, wink start, second dial tone,
and delay dial signalling can be
combined on this ETU.
and/or TLI(2)-U13
These units share the total
Basic
KSU
7 ETUs
56
CO/PBX
Trunks are
lines
7 ETUs
28
CO/PBX
lines
4 ETUs
32
CO lines
4 ETUs
16
CO Lines
7 ETUs
28 DID
Trunks
ETU are
Xen Master
Basic + 1 Basic + 2
Expansion Expansion
KSU KSUs
8 ETUs 8 ETUs
64 64
CO/PBX CO/PBX
lines lines
15 ETUs 16 ETUs
60 64
CO/PBX CO/PBX
lines lines
8 ETUs 8 ETUs
64 64
CO lines CO lines
8 ETUs 8 ETUs
32 32
CO Lines CO Lines
15 ETUs 16 ETUs
60 DID 64 DID
Trunks Trunks
May 2001
Xen Axis
2 ETUs
16
CO/PBX
lines
4 ETUs
16
CO/PBX
lines
2 ETUs
16
CO lines
2 ETUs
8
CO Lines
4 ETUs
16 DID
Trunks
1 - 7