TELEPHONE INTERFACE MODULE (TIM)

14.11 TERMSET MODULES

The Termset modules are used for converting a 2- Wire, Loop Start (LS), Ground Start (GS) or Reverse Burst (RB) circuit to a 4-Wire E&M for use with the Switch 4-Wire E&M board.

14.11.1 EQUIPMENT SETUP

NOTE: Use Type V signaling on E&M for Tellabs cards.

14.11.2 INITIALIZING THE TELLABS CARDS

Switch Settings on 6132B (POTS Applications), see Table 14-9.POTS lines use the Tellabs 6132B Termset. Initialize the Termset switch settings, see Figure 14-22.

Table 14-9 TELLABS 6132B - POTS

Sw

Purpose

 

 

S14

Initially set to NORM. If the E-Lead (Green LED)

 

stays on constantly, or the termset does not answer

 

in-dial, place S14 in REV position. This switch

 

reverses the battery polarity presented to the E&M

 

card from the CO in POTS applications. BYPASS

 

(and removal of B subassembly) will allow 6132 to

 

be used without signaling.

S5

Place in 2W. This switch determines the interface.

S4

To get started, set to 900, with all capacitors in. Set

 

to variable and adjust R38 when performing the

 

actual balance. This balance network allows 600,

 

900 or variable resistor (2k) resistive balance. Also,

 

5 capacitors ranging from .002 ∝F to .032 ∝F in

 

octaves (i.e. .064 ∝F total capacitance) provide for a

 

capacitive balance.

R38

This potentiometer controls the resistive balance in

 

the variable mode of S4.

S12

Supervisory Mode. Set to GS (Ground Start), LS

 

(Loop Start), RB (Reverse Battery) allows the term-

 

set to detect battery reversal from the CO (if it is pro-

 

vided) which indicates hang-up).

S19

Set to sig for Loop Start, inv for Ground Start appli-

 

cations. This switch provides for normal (sig) or

 

inverted (inv) E&M outputs.

S18

Set to sig. This switch provides for normal (sig) or

 

inverted (inv) E&M inputs.

S11

Set to B. This switch swaps roles of E-Lead and M-

 

Lead.

S3

Set to 600. This switch provides 2W port terminat-

 

ing impedance.

S14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NORM

 

 

 

 

 

 

 

 

 

S12

S5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LS (LOOP START)

2W

 

 

 

 

 

 

 

 

GS (GROUND START)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S4

900

ALL CAPS ON

R38

TOP DOWN

S19

SIG (LOOP START)

INV (GROUND START)

S18

SIG

S11 B

S3

600

BOTTOM UP

Figure 14-22 TELLABS 6132B - POTS

14-23