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TABLE 2. CELP VOICE CHANNEL MODULE CONNECTOR PIN ASSIGNMENTS,
Pin No.
Signal Name
1
CHASSIS GROUND
2
- BATTERY (INPUT)
3
M-LEAD
4
TIP OUT
5
RING OUT
6
DISABLE
7
GROUND
8
STATION GROUND (SG) Station Ground provides a reference level for the E&M signal interface.
9
—
10
RING IN
11
E' LEAD
12
—
13
—
14
—
15
STATION BATTERY (SB) Provides a current limited station battery (–12 to –48 V dc sourced from Pin
16
—
17
STATION BATTERY (SB) Provides a current limited station battery (–12 to –48 V dc sourced from Pin
18
—
19
—
20
—
21
—
22
—
23
—
24
E-LEAD
25
TIP IN
DB-25 OUTPUT CONNECTOR
—
–12 V dc to –48 V dc voltage supply for types II, III, IV and V M-Lead
interface.
Pulse signal input to the CELP Voice Channel Module drives the M-lead sen-
sor circuit.
Analog output. Part of the VF TIP and RING output pair.
Analog output. Part of the VF TIP and RING output pair.
Not used
Signal Ground
No connection on Voice Channel Card.
Analog Input. Part of the VF TIP and RING input pair.
Not Used
No connection on Voice Channel Card.
No connection on Voice Channel Card.
No connection on Voice Channel Card.
55) on the CELP VOICE CHANNEL MODULE base card when configured for a
Type II or III interface. For types I, IV or V, station ground is provided on the
SB lead.
No connection on Voice Channel Card.
55) on the CELP Voice Channel Module base card when configured for a Type
II or III interface. For types I, IV or V, station ground is provided on the SB
lead.
No connection on Voice Channel Card.
No connection on Voice Channel Card.
No connection on Voice Channel Card.
No connection on Voice Channel Card.
No connection on Voice Channel Card.
No connection on Voice Channel Card.
Switch on indicates Busy circuit (DC voltage between pins 24 and 8). Switch
off indicates Idle circuit (0 V dc between pins 24 and 8).
Analog Input. Part of the VF TIP and RING input pair.
Description
APPENDIX E
E-3
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