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18-1
VOICE TONE MODULE (VTM)
SECTION 18 VOICE TONE MODULE (VTM)
18.1 DESCRIPTION
The Voice Tone Module (VTM) provides tone
and voice message to modules that indicate call
progress to the users.
The VTM contains 8-fixed slots of digitized
PCM audio messages stored in PROMs that are 4
seconds in length and repeat continuously on the VTM
PCM bus of the Switch (see Table 18-3). The start of
the message is indicated in the transmission so
modules can present the audio message to the user
from the beginning of the message. There may be up
to four VTMs within a system, depending upon the
messages required.
18.2 SETUP PROCEDURE
18.2.1 VTM JUMPER PLACEMENT
18.2.2 VTM SWITCH SETTINGS
18.3 ALIGNMENT SPECIFICATIONS
No alignment is required for the VTM to operate
in the system. However, panel jack output level is
adjustable. The S1 switch setting must be correct for
the starting slot number. Use S2 to select a voice or
tone message.
1. Insert a "butt-set" in the front panel jack.
2. Adjust R22 for a comfortable listening level.
3. If a tone is selected, set the level at TP1, 9 dB lower
than the level on U24, pin 2 for the proper level to
the "butt-set".
NOTE: Revision 2 or earlier should have the line from
P1, pin 1 to R25 cut. Revision 3 or later should have
Jumper on -pin 1 only.
Table 18-1 VTM BOARD JUMPER
PLACEMENT
JU
Pin
Description
J11
J12
2 to 2*
3 to 3*
Selects 27256 EPROM operation
1 to 1
3 to 3
Selects 27128 EPROM operation
1 to 1
3 only
Selects 2764 EPROM operation
J20
1 to 2
Transmit PCM Bus line
2 to 3*
VTM PCM Bus line
*Setting for Normal operation.
Table 18-2 VTM BOARD SWITCH SETTINGS
Switch
VTM starting
slot
Sections
1 2
S1
0*
8**
16
24
Closed
Open
Closed
Open
Closed
Closed
Open
Open
S2 - Monitor Switch. A front panel,
16-position switch with two positions for
each slot. The switch selects the slot to
be monitored at the front panel jacks.
S3 - Reset. Normally open, press to reset.
Momentary switch to reset module.
* VTM 1
** VTM 2.
Summary of Contents for 3000 SERIES
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Page 83: ...CHANNEL INTERFACE MODULE CIM 8 7 Figure 8 3 SUMMATION BOARD ALIGNMENT POINTS DIAGRAM ...
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Page 92: ...DISPATCH CHANNEL MODULE DCM 10 4 This page intentionally left blank ...
Page 100: ...DISPATCH INTERFACE MODULE DIM 11 8 This page intentionally left blank ...
Page 142: ...TELEPHONE INTERFACE MODULE TIM 14 32 This page intentionally left blank ...
Page 146: ...VOTER DIAGNOSTICS MODULE VDM 15 4 This page intentionally left blank ...
Page 156: ...VOICE TONE MODULE VTM 18 4 This page intentionally left blank ...
Page 164: ...WIDE AREA MODULE WAM 19 8 This page intentionally left blank ...
Page 174: ...CONVENTIONAL PATCH MODULE CPM 21 4 This page intentionally left blank ...
Page 178: ...POWER SUPPLY 22 4 Figure 22 6 POWER SUPPLY DRAWER ...
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Page 214: ...Part Number 001 3139 005 10 03 Printed in U S A ...