4. The Example of connection of EX-620 exchange
| ||||
J15 |
| T1 | J7 | T1 |
"Exchange A" |
|
|
| |
|
|
| ||
Terminal board |
|
| Terminal board | |
|
|
"Exchange B"
for stations | for stations |
for | for |
| The cables between the exchanges |
| (4 wires x 8 links) |
"Exchange A" | "Exchange B" |
— 9 —