Filter
Top Products
SYSTEM 25
CABINET
TRUNK
25-PAIR
TAE
CENTRAL
—————————
PORT
OFFICE
CALL
-48V
PROCESSOR
TO
ADDITIONAL
ETUs
ETU
ETU TO SWITCH
ETU TO
(TRUNK)
CO
❑
CPU
ADDITIONAL
❑
ETU
ETU TO SWITCH
ETU TO
25-PAIR
OCTOPUS
STATION
TAE
CENTRAL
OFFICE
(LINE)
25-PAIR
CABLE
—————————
PORT
PART OF SIP
858A
ADAPT.
UP TO FIVE POWER FAILURE
TRANSFER (PFT) STATIONS
(REGISTERED SINGLE-LINE)
(a)
ETU CONNECTIONS (DASHED LINES) NORMAL OPERATION - (NO PFT)
(TRUNK SUPPORTS STANDARD CO CALLS)
ETU
-48V REMOVED
❑
❑
25-PAIR
TO PFT
STATION
(b) ETU CONNECTIONS (DASHED LINES) ON PFT
Figure 2-36. Emergency Transfer Unit Connections
2-192