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