Appendices
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
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| Standard |
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| Call control (menu | Mnemonics | |||
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| Signal |
| setting) |
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numb |
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| dir. |
| Leased | Data |
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V35 | RS449 | RS366 | X21 | RS366 | trig. |
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| line |
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| Manual |
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1 | GND | GND | GND | GND |
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| Frame Ground (connected |
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| to GND) |
2 |
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| DPR |
| Output | x |
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| Digit present |
3 |
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| ACR |
| Input | x |
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| Abandon Call & Retry |
4 |
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| CRQ |
| Output | x |
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| Call Request |
5 |
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| PND |
| Input | x |
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| Present Next Digit |
6 |
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| DLO |
| Input | x |
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| Data Line Occupied |
7 |
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| NB1 |
| Output | x |
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| Digit bit 1 |
8 |
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| NB2 |
| Output | x |
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| Digit bit 2 |
9 |
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| NB4 |
| Output | x |
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| Digit bit 3 |
10 |
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| NB8 |
| Output | x |
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| 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 | SCR(A) |
| S(A) | Input | x | x | x | Signal Clock Receive / |
| (A) |
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| Receive Timing | |||
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16 | SCR | SCR(B) |
| S(B) | Input | x | x | x | Signal Clock Receive / |
| (B) |
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| Receive Timing | |||
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17 | SCT | SCT(A) |
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| Input | x | x | x | Signal Clock Transmit / |
| (A) |
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| Send Timing | |||
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18 | SCT | SCT(B) |
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| Input | x | x | x | Signal Clock Transmit / |
| (B) |
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| Send Timing | |||
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19 | GND | GND |
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| 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 | RR (A) |
| I (A) | Input | x | x |
| Received Line Signal |
| (CD) |
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| Detector / Carrier Detect / |
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| Receiver Ready / |
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| Indication |
23 | GND | RR (B) |
| I (B) | Input | x | x |
| Received Line Signal |
| (RLSD) |
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| Detector / Carrier Detect / |
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| Receiver Ready / |
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| Indication |
24 | RI | IC |
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| Input | x |
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| Ring Indicator / Incoming |
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| Call | |
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25 | LOS | LOS |
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| Output | x | x |
| Loss Of Signal |
26 | DTR |
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| Output | x | x |
| (Data) Terminal Ready |
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