Domaći
posredna centrala | tandem exchange | |
posredna centrala | tandem office | |
posredna centrala | tandem switch | |
posredna centrala | tandem switching exchange |
...
posredna centrala | tandem exchange | |
posredna centrala | tandem office | |
posredna centrala | tandem switch | |
posredna centrala | tandem switching exchange |