NEC Univerge SV9100, System Hardware Manual

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Issue 2.0
7-70 Installing SV9100 Optional Equipment
4. In places where water or other fluids comes in contact with the
equipment.
5. In areas near high-frequency machines or electric welders.
6. Near radio antennas (including shortwave).
13.4.5 Powering On the IP Video Doorphone
1. When powering on the Doorphone, it may take up to 60 seconds until
a doorphone starts. The Power lamp will begin blinking. When the
lamp turns solid, the Doorphone is available.
2. If the Power lamp continues blinking for more than 70 seconds, the
authentication to the main device may have failed. Reset the
doorphone to attempt authentication again.
13.5 Installation
13.5.1 Connect a Door Unlock Device to the IP Video Doorphone
Connecting the Door Unlock Device to an IP Video Doorphone (using Relay
contacts):
1. When the Unlock Device Relay output is normally closed. The 2-wire
cable is connected the
C
and
NC
terminals.
2. When the Unlock Device Relay output is normally open. The 2-wire
cable is connected to the
C
and
NO
terminals.
Figure 7-80 C and NC Terminal Connections
Figure 7-81 C and NO Terminal Connections