edited © David E. Knodel
| Slot | Interface | Port | Model 20 Location |
| 1 | INP4 | ||
| 2 |
|
||
3 |
QDIU |
1 |
PRI #1 |
2 |
TTLC #1 |
||
3 |
Conference Room 700S |
||
4 |
PRI #2 |
||
| 4 | QRVX |
1 |
|
|
2 |
||
| 3 | |||
| 4 | |||
| 5 | QDIU | 1 |
TTLC #2 |
| 2 | TTLC #3 | ||
| 3 | TTLC #4 | ||
| 4 | |||
| 6 | MCU |