Installation and Upgrades for DEFINITY ONE and
IP600 Internet Protocol Release 10
555-233-109
Issue 6
December 2001
Install and Cable the Cabinet
1-125Install emergency transfer panel and associated telephones
1
The maximum range for out-of-building digital voice terminals is:
■ 3400 feet (1036 m) when using 24 AWG (0.26 mm
2
) wire
■ 2200 feet (670 m) when using 26 AWG (0.14 mm
2
) wire
With the use of a data link protector (an isolating transformer used to remove
phantom power on the system side and re-introduce it on the terminal side), the
range can extend to
■ 5000 feet (1524 m) using 24 AWG (0.26 mm
2
) wire or
■ 4000 feet (1219 m) using 26 AWG (0.14 mm
2
) wire
When using a protector, the voice terminal must be locally powered by an external
power supply or through the AC power cord provided with some of the 7400-type
voice terminals. Install the protector on the equipment side of the protection in
both buildings.
See Table 1-3 on page 1-8 for circuit protector and data link protector comcodes.
Install emergency transfer panel and
associated telephones
NOTE:
Install only 1 emergency transfer power panel per system.
An 808A Emergency Transfer Panel (or equivalent), mounted next to the
trunk/auxiliary field, provides emergency transfer capability. See Figure 1-64 on
page 1-126. Also see Table 1-19 on page 1-112 for the pinout of the AUX (J1)
connector. The transfer panel provides emergency trunk bypass or power-fail
transfer for up to 5 incoming CO trunk loops to 5 selected station sets. The 808A
equipment’s Ringer Equivalency Number (REN) is 1.0 Amp.
Use analog telephones for emergency transfer. The 500 and 2500 type
telephones can also be used as normal extensions. Emergency transfer capability
may be provided on analog CO and Wide Area Telecommunications Service
(WATS) trunks.
At the MDF, the unit is controlled by a connection to a yellow terminal
row/connecting block in the trunk/auxiliary field. The unit is controlled by -48 VDC
from the EM TRANS RELAY PWR terminals.
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