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10. From the Device Type drop down list, select the type of device to which the RVON-C card is connecting.
11. From the Device Channel drop down list, select the channel on the device to which the RVON-C card will
communicate.
12. From the CODEC Type drop down list, select the CODEC type you want to use for this channel.
13. From the Packet Size drop down list, select the size of each audio packet.
NOTE: A CODEC is an algorithm used to compress audio. There are 5 Codices supported by Telex: G.711 μs law,
G.711A law, G.729AB, G.723 (5.3k), and G.723 (6.3k). The type of CODEC will dictate the quality of audio you
hear and the network bandwidth used. The packet size determines how much audio data is carried across the
network in each transmitted packet. The CODEC type and packet size chosen require different amounts of
bandwidth from the network (see “Specifications” on page 4). As with the CODEC type, the packet size you
choose for the audio transfer will affect the audio you hear and the bandwidth you use over the network. The
larger the audio packet you choose to use, the lower the bandwidth used. However, the larger packet size can
result in a higher delay and longer gaps if the packet is lost. On the other hand, smaller packet sizes result in
larger bandwidth use, but lower delays and smaller gaps if the packet is lost. The Intercom System Engineer and
the Network Administrator may want to work together in choosing the CODEC type and packet size suitable for
the size of the network, so degradation of network resources does not happen.
14. Select Enable VAD (Voice Activity Detection), if you want to conserve bandwidth when the audio level is below a
given threshold.
NOTE: Voice Activity Detection saves network bandwidth by stopping the flow of audio packets when silence is
detected. VAD is similar to VOX.
At this point you may choose another channel to configure or choose another card to configure.
15. Once you are completely finished, click Apply.
Apply sends all of the changes to all the cards in the intercom, or click Cancel to discard all changes you make.
Configure the Devices Connected to the RVON-C card
See the device user manual for specific configuration instructions.
Setting up a Serial Pass-Through Port Connection or Serial Connection
If you plan to pass data using either a Serial Pass-Through or Serial Connection you will need to set the DIP switches and
jumpers to reflect which connection you will want to use.
NOTE: When making adjustments to the DIP switches and jumpers, you will need to take the front card out of Cronus.
To use Serial Pass-Through, do the following:
1. Set DIP Switch 6 to the OPEN position
2. Set the serial protocol, either RS232 or RS485.
• For RS232, jumper pins 2 & 3 of J10, J11, and J12
• For RS485, jumper pins 1 & 2 of J10, J11, and J12
3. Once you have set the correct configuration, replace the RVON-C into Cronus and hook the DB-9 connector to the
RVON-C backcard.
To use the Serial connection, do the following:
1. Set DIP Switch 6 to the CLOSED position
2. Set the serial protocol, either RS232 or RS485.
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