User`s manual

5.2. Connecting an ISDN telephone set to 2N

GSM ISDN GATEWAY Lite

The TE1 port are connected to the ISDN. If the network is not connected, the telephone

must by supplied by an external supply adapter that simulates the voltage of the ISDN. The

mains supply adapter that simulates the ISDN voltage may be ordered with its ordering no.

502000.

GSM

network

ISDN terminals

Power adapter

ISDN

GSM

gate

Fig.15: Connecting an ISDN phone set to the port with a

possible simulation of supply voltage for ISDN phones