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APPENDIX E
TABLE 1. CELP VOICE CHANNEL MODULE CONNECTOR PIN ASSIGNMENTS,
Pin No.
Signal Name
28
M-LEAD
29
+ 12 V dc
30
AF COL SEL
31
-12 V dc
32
GROUND
33
+ 5 V dc
34
MINOR ALARM BUS
35
XD ROW SEL
36
XD COL SEL
37
XC COL SEL
38
XMIT DATA BUS
39
OS BUS
40
X BUS
41
Z BUS
42
CB5
43
CB6
44
CB7
45
RD ROW SEL
46
RC ROW SEL
47
RC COL SEL
48
RESP 4
49
RD COL SEL
50
—
51
TIP IN
52
RING IN
53
STATION GROUND (SG)
54
E' LEAD
55
N BATTERY
56
E-LEAD
* IN - Input — OUT - Output — BI - Bidirectional
E-2
CARD EDGE INTERFACE, P1 (Cont.)
*Direction
IN
Pulse signal input to the CELP Voice Channel Module drives the M-lead
sensor circuit.
IN
Positive 12-volt power supply.
IN
When AF COL SEL/AF ROW SEL low, RESP 1-4 are enabled.
IN
Negative 12-volt power supply.
Signal Ground
IN
Positive 5-volt power supply.
OUT
Card alarm output compatible with system alarm bus structure.
IN
When XD ROW SEL/XDD COL SEL are low transmit data is transferred
to the XMIT DATA BUS>
IN
When XD ROW SEL/XDD COL SEL are low, transmit data is transferred
to the XMIT DATA BUS.
IN
When XC COL SEL/XC ROW SEL are low, loopback and alarm informa-
tion are placed on the WXYZ buses.
OUT
When XD ROW SEL/XD COL SEL are low, the output buffer is driven
out of the high impedance state and transfers to the XMIT DATA BUS.
OUT
Tri-state gate output goes low when the CELP Voice Channel Module is
addressed by XC ROW SEL/XC COL SEL if a change in the state of
control information has occurred. Follows same controls as the D BUS.
BI
The direction of X BUS is determined by the transmit control selects
(P10 and P37).
BI
The direction of Z BUS is determined by the transmit control selects
(P10 and P37).
IN
Not Used
IN
Not Used
IN
Not Used
IN
When RD ROW SEL/RD COL SEL are low, the RCV/DATA bus is trans-
ferred to the CELP VOICE CHANNEL MODULE.
IN
When RC ROW SEL/RC COL SEL are low, loopback and alarm informa-
tion are received from the WXYZ busses.
IN
The Read/Write signal strobed by a positive transition from RESP A/B.
When high, status information is read from the card. If low, controls are
written to the CELP Voice Channel Module at the next low pulse of AF
SEL. Note that AF SEL is asserted when both AF COL and AF ROW are
low.
BI
Corresponds to address line A3 and data line D3.
IN
When RD ROW SEL/RD COL SEL are low, the RCV/DATA bus is trans-
ferred to the CELP VOICE CHANNEL MODULE.
—
IN
Analog Input. Part of the VF TIP and RING input pair.
IN
Analog Input. Part of the VF TIP and RING input pair.
IN
Station Ground provides a reference level for the E&M signal interface.
Not Used
IN
–12 V DC to –48 V dc voltage supply or types II, III, IV and V
M-Lead interface.
OUT
FET. output switch requires an external voltage greater than 3 V.
"Busy" represents switch closed. "Idle" represents switch open.
Description
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