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3.3.14 TMDID8 (for U.S. Only)

Introduction

The TMDID8 board (trunk module direct inward dialing) provides direct inward dialing from the central office (CO) to the OfficePro.

The TMDID8 Module has eight trunk circuits that connect to analog trunks. The circuits convert incoming analog signals into pulse-code modulation (PCM) for processing by the digital OfficePro system.

The circuits can be set up for immediate start or wink start.

Switches and LEDs

Figure 3-60 TMDID8 Switches and Indicators (for U.S. Only)

Switches

Adjust switches S1 to S4 to compensate for trunk loop resistance.

Table 3-56 Trunk Conditions for Setting TMDID8 Switches (for U.S. Only)

Trunk 
Loop < 1800 Ohms: Open Switches 
Loop > 1800 Ohms: 
Close Switches 
S1A, S1B, S1C, S1D 
S1A, S1B, S1C, S1D 
S1E, S1F, S1G, S1H 
S1E, S1F, S1G, S1H 
S2A, S2B, S2C, S2D 
S2A, S2B, S2C, S2D 
S2E, S2F, S2G, S2H 
S2E, S2F, S2G, S2H 
S3A, S3B, S3C, S3D 
S3A, S3B, S3C, S3D 
S3E, S3F, S3G, S3H 
S3E, S3F, S3G, S3H 
S4A, S4B, S4C, S4D 
S4A, S4B, S4C, S4D 
S4E, S4F, S4G, S4H 
S4E, S4F, S4G, S4H 

LED Statuses and Their Meanings

Table 3-57 TMDID8-LED Statuses (for U.S. Only)

Status of LEDs 1-8 
Meaning 
Off 
Channel is idle, ready to use 
On 
Channel is seized 
Flashing 
Channel is deactivated  
Winking 
System software test in progress 

Cable and Connector Assignment (Backplane)

Table 3-58 TMDID8-Cable Assignment (for U.S. Only)

Pair 
Color Code 
Backplane Connector Pins 
TMDID8 Module 
wht/blu 
26 
Port 1 
blu/wht 
wht/ora 
27 
Port 2 
ora/wht 
wht/grn 
28 
Port 3 
grn/wht 
wht/brn 
29 
Port 4 
brn/wht 
wht/slat 
30 
Port 5 
slat/wht 
red/blu 
31 
Port 6 
blu/red 
red/ora 
32 
Port 7 
ora/red 
red/grn 
33 
Port 8 
grn/red 

Note: Pairs 9 through 25 are not used.

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