Manual

Contact Closures
Contact closure signals are available via the 9-pin mini-DIN connector.
In current rmware, only contact closure outputs 1 & 2 are supported. Contact closure #1 is acve when a call is acve on channel 1, and
contact closure #2 is acve when a call is acve on channel 2.
Contact Closure inputs perform the following funcons:
#1 - Disconnect acve call on Channel 1.
#2 - Disconnect acve call on Chanel 1 and disable invite.
#3 - Disconnect acve call on Channel 2.
#4 - Disconnect acve call on Channel 2 and disable invite.
Inputs are triggered by shorng the respecve input to Pin 9. Outputs consist of an open collector circuit which, when inacve, will oer
a high-impedance path to Pin 9 and, when acve, will oer a low-impedance path to Pin 9. These outputs are capable of sinking up to
200 mA at a voltage up to 12 V. Do not switch AC mains power using these contacts.
Contact Closure Pinouts:
Pin 1 Output #1
Pin 2 Output #2
Pin 3 Output #3
Pin 4 Output #4
Pin 5 Input #1
Pin 6 Input #2
Pin 7 Input #3
Pin 8 Input #4
Pin 9 Ground
Aachment Details
At a minimum, Opal will need two audio connecons and a network connecon. Levels of all analog audio I/O is 0 dBu (0.775 V) nominal.
This level will provide 20 dB headroom before the clipping point. Input audio is reected on the front panel LED based peak meters as
indicated in the following gure. Clipping is indicated by the red LED on these meters.
1 2 3 4 5
RESET
READY
AUDIO LEVEL
1 2
Opal needs a network connecon to be useful. On Opal, network connecons are made via a standard 1000 Base-T Ethernet connecon
on an RJ-45 connector.
In most ways, Opal will look like an ordinary computer to this network. In fact, Opal contains an embedded computer with a Linux-
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