NEC Electra Elite IPK General Description Manual page 112

Electra Elite IPK
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Table 3-2 Maximum System Capacities for Trunk Interface ETUs (Continued)
Trunk Interface
ETUs
COI(8)-U( ) ETU
COIB(4)-U( ) ETU
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General Description Manual
Description
8-port CO/PBX Line Interface
Electrical fuses (posistors) are built into
this ETU that supports eight outside
(CO/PBX) lines and provides circuitry for
ring detection, holding, and dialing.
The outside lines can be any
combination of Loop Start or Ground
Start DTMF trunks.
This ETU is installed in slots S1~S8 in
the basic or expansion B64-U20 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.
4-port COI or COID (CO/PBX) Line
Interface
This ETU can function the same as the
COI(4)-U( ) or COID(4)-U( ) ETU to
provide Central Office interface. When
ETU is set for COID mode, Loop Start
trunks and/or Caller ID trunks are
supported. The COIB(4)-U20 supports
loop start only. When the ETU is set for
COI mode, Loop Start or Ground Start is
supported using COIB(4)-U10. Caller ID
is not supported in COI mode.
Connections for Ground Start trunks are
polarity sensitive.
Only DTMF signaling is supported.
This ETU can provide an E911 CAMA
trunk.
COID mode: Caller ID trunks must be
installed in slots 1~4.
This ETU shares the total number of
CO/PBX lines in the system.
Tip and Ring electrical fuses are
provided to comply with UL 1459
requirements.
Maximum Capacities
Basic Port Expanded
Package Port Package
2 8
4 14
Document Revision 4
Notes
Note 1
Note 1
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