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Figure 4-20 shows voice terminal connections to the system cabinets via the SIP. Typically,
voice terminals are plugged into modular wall jacks that provide a cut-down block for
building wiring.
At the SIP, 858A Adapters provide a cut-down point for 4-pair wire runs.
An octopus cable (WP90780) from a station CP provides 25-pair connectorized cabling to
eight 4-pair modular jacks.
Each jack is terminated on the SIP by a 858A Adapter. An
octopus cable connects a maximum of eight voice terminals to a port CP.
DIGITAL SWITCH
(1)
STATION
CIRCUIT
PACK
———
C2
———
———
(8)
PART OF SIP
UNTERMINATED
4-PAIR
BUILDING
WIRE
❘❘❘❘❘❘
❘❘❘❘❘❘
❘❘❘❘❘❘
858A
ADAPT
❘❘❘❘❘❘
❘❘❘❘❘❘
❘❘❘❘❘❘
❘❘❘❘❘❘
❘❘❘❘❘❘
MODULAR
JACKS
❘❘❘❘❘❘
858A
❘❘❘❘❘❘
ADAPT
❘❘❘❘❘❘
❘❘❘❘❘❘
VOICE TERMINALS,
ADJUNCTS,
POWER UNITS
LEGEND :
C2 -
OCTOPUS CABLE (WP90780) - PEC 2720-05P
858A ADAPTER (FURNISHED BY INSTALLER) -
SIX 4-PAIR MODULAR JACKS TO
SIX 11O-TYPE CUTDOWN BLOCKS
Figure 4-20. Typical SIP Connections
4-50