Document Revision 4C Electra Elite IPK II
2 - 1040 Universal Slots
COIB(4)-U( ) ETU This 4-port CO/PBX Line Interface can
function the same as the COI(4) or
COID(4) ETU to provided a Central
Office Interface. When set for COID
mode, Loop Start DTMF trunks and/or
Caller ID trunks are supported, and the
ETU supports loop start only. When
the ETU is set for COI mode, loop start
or ground start DTMF trunks are
supported, but Caller ID is not
supported. Connections for ground
start trunks are polarity sensitive. For
COID mode, Caller ID trunks must be
installed in slots S1~S4. 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.
14 23 Notes 1, 3
COIB(8)-U( ) ETU 8-port CO/PBX Line Interface can
function the same as the COI(4) or
COID(4) ETU to provided a Central
Office Interface. When set for COID
mode, Loop Start DTMF trunks and/or
Caller ID trunks are supported, and the
ETU supports loop start only. When
the ETU is set for COI mode, loop start
or ground start DTMF trunks are
supported, but Caller ID is not
supported. Fax CO Branch is not
supported. Connections for ground
start trunks are polarity sensitive. Only
DTMF signaling is supported. For
COID mode, Caller ID trunks must be
installed in slots S1~S4. 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.
7 23 Note 1
Table 2-42 Maximum System Capacities for Trunk Interface ETUs (Continued)
Trunk Interface
ETUs
Description
Maximum Capacities
Notes
Basic Port
Package
Expanded
Port Package
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