Specifications

8.2
Line Name
8.3
Line Type
You can assign a name to a line. A name shows in the display of an
LCD speakerphone as an identification aid. A valid name is composed
of any seven alpha-numeric characters, but the first character must be
an alphabetic character.
.
Condition the line port as to the type of line or function that the port
serves.
Ground Start Lines
With ground-start lines, the DXP momentarily grounds the ring lead,
signally the CO to establish a communications link. When the CO
detects this ground, it momentarily grounds the TIP lead. The DXP
responds by removing its ground connection and bridging itself across
the tip and ring leads. The CO then removes its ground connection and
returns dialtone to the DXP. Ground start lines help in preventing
call-collision and are useful in high-traffic applications.
Loop Start Lines
With loop start lines, the DXP bridges a resistance across the tip and
ring leads, signaling the CO to establish a communications link for an
outgoing call. The CO detects the resulting current flow and supplies
dial tone to the DXP. The CO signals an incoming call to the DXP by
placing an alternating voltage (ring signal) on the tip lead. The DXP
then generates ringing to the DXP station being called. When a station
answers the ringing, the circuit is completed as it was for outgoing
calls. Loop start lines cannot provide any sure means of determining
when a distant party hangs up his or her telephone. For a system that
experiences moderate incoming and outgoing call volume and does
not cost calls, loop start lines provide an economical choice for
connecting the DXP to the central office (CO) equipment.
8 - 2 Line Programming