NEC Electra Elite 192 Hardware Manual page 60

Issue 6
Equipment Name
The Central Office Caller ID ETU detects Caller ID
signals from the central office and sends caller
identification to the CPUB( )-U10 ETU.
Electrical fuses (posistors) are built into this ETU
That supports four outside (CO/PBX) lines and
provides circuitry for ring detection, holding, and
dialing.
COID(4)-U10 ETU
This ETU is loop start, DTMF only and is installed
in slots S1~S4 in the basic or first expansion
B64-U10 KSU.
This ETU can provide an E911 CAMA trunk.
The maximum number depends on other trunk
cards installed. This ETU shares the total number
of CO/PBX lines in the system.
The Central Office Caller ID ETU detects Caller ID
signals from the central office and sends caller
identification to the CPUB( )-U10 ETU.
Electrical fuses (posistors) are built into this ETU
That supports eight outside (CO/PBX) lines and
provides circuitry for ring detection, holding, and
dialing.
COID(8)-U10 ETU
This ETU is loop start only and is installed in slots
S1~S4
B64-U10 KSU.
This ETU can provide an E911 CAMA trunk.
The maximum number depends on other trunk
cards installed. This ETU shares the total number
of CO/PBX lines in the system.
The Direct Inward Dialing Interface Unit supports
up to four DID or four 2-way DID lines.
DID(4)-U10 ETU requires one interface slot
position in the KSU.

DID(4)-U10 ETU
This ETU is installed in slots S1~S8 in any
B64-U10 KSU.
The maximum number depends on other trunk
cards installed. This ETU shares the total number
of CO/PBX lines in the system.
1 - 8
Description
in the basic or
Immediate, wink start, second dial tone, and
delay dial signaling can be combined on this
ETU.
Basic KSU
4 ETUs
16
CO (Class)
lines
4 ETUs
32
CO (Class)
first expansion
lines
Each
7 ETUs
28 DID
Trunks
Electra Elite
Basic + 1 Basic + 2
Expansion Expansion
KSU KSUs
8 ETUs 8 ETUs
32 32
CO (Class) CO (Class)
lines lines
8 ETUs 8 ETUs
64 64
CO (Class) CO (Class)
lines lines
15 ETUs 16 ETUs
60 DID 64 DID
Trunks Trunks
Introduction