ZyXEL Communications Gateway 400 User Manual page 17

Step 4 Connection of telephone system or telephones.
The following figures illustrate the various configuration scenarios for the S
400 depending on the telephony hardware used:
Only point-to-point connection

Only point-to-multipoint connection

Mixed operation of point-to-point and point-to-multipoint connections

Connect your telephone system or telephones to the sockets S
a2b). See "Installation diagram for S0 bus" on page 18.
Note
The ISDN interfaces of the Gateway 400 support the Restricted Power Mode.
This may reduce the functionality of ISDN telephones (e.g., no permanent display) or
cause some telephones to not behave as expected (e.g., signaling of all incoming calls,
regardless of the configured MSN). If necessary, connect an ISDN bus power supply.
Figure 1 Installation diagram for a point-to-point connection
Option 2
Option 1
Installation | Gateway 400 User Guide
ports on the Gateway
0
1 to S 4 or the clamps 1 to 4 (a1b
0 0
PABX
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