E-Lead Signaling State; E-Lead Polarity; Option Selections, E-Lead Signaling State; Option Selections, E-Lead Polarity - General DataComm TMS-3000 Operating And Installation Instructions

INSTALLATION
E-Lead Signaling
State
TABLE 2-4. OPTION SELECTIONS, E-LEAD SIGNALING STATE
Feature
Loss of Power

E-Lead Signaling State

Note: Busy should not be used in private line automatic ringdown applications, as a loss of power will cause the phones at both
ends to ring until power is restored.

E-Lead Polarity

TABLE 2-5. OPTION SELECTIONS, E-LEAD POLARITY
Feature
Electrical Polarity of E-
lead relative to Station
Ground
2-6
Table 2-4 describes how the E-Lead signaling is conditioned on loss of
power in the TMS-3000 controller.
Jumper Jumper
X5 X6
Position Position
Busy (BSY) Busy (BSY)
Idle ( IDL) Idle ( IDL)
Idle Busy
Busy Idle
Table 2-5 describes the procedure for setting the E-Lead Polarity in rela-
tion to Station Ground.
Jumper Jumper
X7 X8
Position Position
– –
+ +
+ –
– +
Application
With these two jumpers set in the position shown, the
E-Lead (pin 24 on the DB-25 EIA connector) is in a
Busy state during loss of power. This selection is
generally made for connections between the voice
channel and PBX systems, or Tellabs and other voice
termination systems (Not in PLAR applications, see
Note below).
With these two jumpers set in the position shown, the
E-Lead (pin 24 on the DB-25 EIA connector) is in an
Idle state during loss of power. This selection is gen-
erally made for connections between the voice chan-
nel and automatic ringdown circuits.
Invalid. Do not use.
Invalid. Do not use.
Application
E-Lead is negative.
E-lead is positive.
Invalid. Do not use.
Invalid. Do not use.