
TELEPHONE INTERFACE MODULE (TIM)
The Termset modules are used for converting a 2- Wire, Loop Start (LS), Ground Start (GS) or Reverse Burst (RB) circuit to a
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
Sw | Purpose |
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S14 | Initially set to NORM. If the |
| stays on constantly, or the termset does not answer |
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| 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 |
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 |
| Lead. |
S3 | Set to 600. This switch provides 2W port terminat- |
| ing impedance. |
S14 |
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NORM |
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S5 |
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| LS (LOOP START) | ||
2W |
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S4
900
ALL CAPS ON
R38
TOP DOWN
S19
SIG (LOOP START)
INV (GROUND START)
S18
SIG
S11 B
S3
600
BOTTOM UP
Figure