BASIC BOARD MODULE (BBM)

7.5.6 TEST "6"

This test is used in conjunction with Test "5" to verify the correct operation of the main and secondary PCMs. Use Test "1" and Test "8" to setup the cards.

This test is the same as Test "5" but transmits in Slot 0 and receives in Slot 31.

7.5.7 TEST "7"

Closes the relays on the telephone line personality card. This connects the telephone line and the Silent Slot of the VTM Bus to the main transmit audio.

This test is conducted the same as Test "1" except the System Alignment Tone is replaced with the Silent Slot of the VTM PCM.

7.5.8 TEST "8"

Turns on the FSK and transmits the 1200 Hz tone.

1. The FSK is generated by U16, passes through level op amp U32B.

Adjust R86 for a level of -12 dBm ±0.5 dB at TP4.

2.The FSK then passes through transmission gate U31C with less than 0.25 dB of loss. The control line (U31C, pin 6) should be high ( > 8V).

3.The signal then passes to the balanced line driver op amps U28A and U28B.

Adjust R44 for a level of -21 dBm ±1 dB at J12.

The level should be -21 dBm ±1 dB across the Tx line.

7.5.9 TEST "9"

This allows the TIM-DID to answer an incoming call and provide System Alignment Tone to the telephone line. This allows the DID to have the hybrid adjust circuit tuned.

This test is the same as Test "1". The exception here is that the DID waits to answer the incoming call

and then sends the System Alignment Tone to the telephone line.

7.6 DS1 DISPLAY DEFINITIONS

The following tables define the tasks performed when displayed on DS1.

Table 7-4 DIM CARD DISPLAY/TASKS

DS1

TASK

0

Initialization

1

Await Enable

2

Idle

3

Transmit

4

Receive

5

All Call

6

Connect PTT

7

Trunk Verification

8

Interrogate

9

Trunk Conversation

A

Facility Acquisition

A

Await Trunk

B

Trunk Destination Conversation

C

Ring Channel

D

Channel Conversation

E

Console Initialization

F

Standby

Table 7-5 CCM CARD DISPLAY TASKS

DS1

TASK

 

 

0

Initialization

1

Await Enable

2

Idle

2*

IDB Bus Access Error

3

Transmit

3*

CSB Bus Access Error

4

Receive

5

Duplex

8

Suspend Audio

F

Standby

* With Red Alarm LED CR402 on

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