NEC Electra Elite IPK General Description Manual page 113

Document Revision 4
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Table 3-2 Maximum System Capacities for Trunk Interface ETUs (Continued)
Trunk Interface
ETUs
COIB(8)-U( ) ETU
DID (4)-U( ) ETU
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3 - 10
Description
8-port (COI or COID CO/PBX Line
Interface
This ETU can function the same as the
COI(8)-U( ) or COID(8)-U( ) ETU to
provide Central Office interface. When
ETU is set for COID mode, Loop Start
trunks and Caller ID trunks are
supported. When the ETU is set for COI
mode, Loop Start is supported. Ground
Start Trunks are not supported. Caller
ID is not supported in COI mode. Fax
CO Branch is not supported.
Only DTMF signaling is supported.
This ETU can provide an E911 CAMA
trunk on port 3 or 7.
The maximum number depends on other
Trunk cards installed.
This ETU shares the total number of
CO/PBX lines in the system.
Tip and Ring electrical fuses are
provided to comply with UL 60950
requirements.
4-port Direct Inward Dialing Interface
The Direct Inward Dialing Interface Unit
supports four DID or four 2-way DID
lines. Each DID(4)-U( ) ETU requires
one interface slot position in the KSU.
Immediate, wink start, second dial

tone, and delay dial signaling can be
combined on this ETU.
This ETU is installed in slots S1~S8 in
any B64-U20 KSU.
The maximum number depends on other
trunk cards installed. This ETU shares
the total number of CO/PBX lines in the
system.
Maximum Capacities
Basic Port Expanded
Package Port Package
2 8
4 16
Electra Elite IPK
Notes
Note 1
Note 1
Equipment