Appendix 19: cable specifications – TANDBERG 880 MXP User Manual
Page 299
Appendices
285
Appendix 19: Cable Specifications
TANDBERG MXP and Classic Endpoints that support External
Network
External Network Pinout
With respect to signals on the NET port:
• For balanced signals a “0”=low voltage is defined as terminal A positive with respect to
terminal B.
• For unbalanced signals a “0”= low voltage is defined as terminal positive with respect to
GND.
Pinout on 26-pin HD connector J5
Standard
Call control (menu
setting)
Mnemonics
Pin
numb
V35 RS449
RS366
X21
Signal
dir.
RS366
Leased
line
Data
trig.
Manual
1 GND
GND
GND
GND
Frame
Ground
(connected
to GND)
2
DPR
Output
x
Digit
present
3
ACR
Input
x
Abandon Call & Retry
4
CRQ
Output
x
Call
Request
5
PND
Input
x
Present Next Digit
6
DLO
Input
x
Data Line Occupied
7
NB1
Output
x
Digit bit 1
8
NB2
Output
x
Digit bit 2
9
NB4
Output
x
Digit bit 3
10
NB8
Output
x
Digit bit 4
11
SD (A)
SD (A)
T (A)
Output
x
x
x
Send Data / Transmit
12
SD (B)
SD (B)
T (B)
Output
x x x
Send Data / Transmit
13
RD (A)
RD (A)
R(A)
Input
x x x
Receive Data
14
RD (B)
RD (B)
R(B)
Input
x x x
Receive Data
15 SCR
(A)
SCR(A) S(A)
Input
x x x
Signal Clock Receive /
Receive Timing
16 SCR
(B)
SCR(B) S(B)
Input
x x x
Signal Clock Receive /
Receive Timing
17 SCT
(A)
SCT(A)
Input
x x x
Signal Clock Transmit /
Send Timing
18 SCT
(B)
SCT(B)
Input
x x x
Signal Clock Transmit /
Send Timing
19 GND GND
GND
20
TR (A)
C(A)
Output
x
x
Terminal Ready / Control
21
TR (B)
C(B)
Output
x
x
Terminal Ready / Control
22 RLSD
(CD)
RR (A)
I (A)
Input
x
x
Received Line Signal
Detector / Carrier Detect /
Receiver Ready /
Indication
23 GND
(RLSD)
RR (B)
I (B)
Input
x
x
Received Line Signal
Detector / Carrier Detect /
Receiver Ready /
Indication
24 RI IC
Input
x
Ring Indicator / Incoming
Call
25
LOS
LOS
Output
x
x
Loss Of Signal
26 DTR
Output x
x
(Data)
Terminal
Ready