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TABLE 1. CELP VOICE CHANNEL MODULE CONNECTOR PIN ASSIGNMENTS,
Pin No.
Signal Name
1
CHASSIS GROUND
2
AF ROW SEL
3
–12 V dc
4
GROUND
5
+ 5 V dc
6
SYNC BUS
7
02 CLK BUS
8
RESP A/B
9
01 CLK BUS
10
XC ROW SEL
11
D BUS
12
W BUS
13
Y BUS
14
CB1
15
CB2
16
CB3
17
CB4
18
RESP 1
19
RESP 2
20
RESP 3
21
RCV DATA BUS
22
—
23
DISABLE
24
TIP OUT
25
RING OUT
26
—
27
STATION BATTERY
(SB)
* IN - Input — OUT - Output — BI - Bidirectional
APPENDIX E
CELP MODULE CONNECTOR PIN ASSIGNMENTS
CARD EDGE INTERFACE, P1
*Direction
IN
When AF ROW SEL and AF COL SEL are both low, then RESP 1-4 are
enabled. During a write operation, data must be valid on the positive go-
ing edge.
IN
Negative 12-volt power supply.
Signal Ground.
IN
Positive 5-volt power supply.
IN
High when in normal operation. Low indicates loss of mux channel syn-
chronization.
IN
Not Used
IN
Used as an address strobe to qualify the four RESP lines (Active Low).
IN
Not Used
When XC ROW SEL/XC COL SEL are low, loopback and alarm informa-
tion is placed on the WXYZ control buses.
OUT
Output of drivers goes low to indicate a change of state in controls.
BI
The direction of the W BUS is controlled by the transmit control selects.
BI
The direction of the Y BUS is controlled by the transmit control selects.
IN
The 1.024-MHz clock.
IN
The 921.6-kHz clock.
IN
Not Used
IN
Not Used
BI
RESP 1 is address input line A0 when RESP A/B is low. RESP1 is I/O
data line D0 when selected by AF ROW SEL and AF COL SEL both low.
BI
Corresponds to address line A1 and data line D1.
BI
Corresponds to address line A2 and data line D2.
IN
Receive aggregate data from the common TX/RX card.
No connection on Voice Channel Card
IN
Not Used
OUT
Analog output. Part of the VF TIP and RING output pair.
OUT
Analog output. Part of the VF TIP and RING output pair.
No connection on Voice Channel Card
OUT
Provides a current limited station battery (–12 to –48 V dc sourced from
Pin 55) on the CELP VOICE CHANNEL MODULE base card when con-
figured for a Type II or III interface. For types I, IV or V, station ground
is provided on the SB lead.
Description
E-1
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