Auerswald Analog/ISDN Converter Installations- Und Bedienungshandbuch Seite 43

Fig. 8: ISDN Synchronization
ISDN PBX
NT
Analog/ISDN Converter
(e.g. by Auerswald)
(by network provider)
U Connection
K0
ISDN
Connect one of the "Sync ISDN" jacks with the external S port of the PBX
0
Connect one of the "Sync ISDN" jacks with the NT of the network provider