Technical Guide | HelixNet IP Network Guidance Page 15
- 600-900kbps from switch to each HXII-BP
- From switch to each HMS-4X
o 13*300kbps = 3.9Mbps from switch to HMS-4X (for HXII-BP)
o 2*13*300kbps = 7.8Mbps from switch to HMS-4X (for receiving 13
audio sources from each other two HMS-4X)
o Total = 11.7Mbps
- From switch to each HMS-4X to switch
o 13*(600-900) = 7.8-11.7Mbps from HMS-4X to switch (for HXII-BP)
o 2*13*300 kbps = 7.8Mbps from HMS-4X to switch (for sending 13
audio sources over to other two HMS-4X)
o Total = 15.6 – 19.5Mbps
Up to 60 HelixNet devices / endpoints can be connected over a network, making it
important to understand and calculate the bandwidth needs for the HelixNet system.
Endpoints are assigned to devices as follows:
- One (1) endpoint for HXII-BP/HKB-2X
- Two (2) endpoints for HMS (Mic/Headset/Loudspeaker is one, PGM is the
other)
- One (1) endpoint per 2-wire/4-wire port (i.e. 2 endpoints per HelixNet
module or LQ)
- Two (2) endpoints for each module installed – HLI-2W2, HLI-4W2
- Three (3) endpoints for HRM (Mic/Headset/Loudspeaker is one, 4-wire PGM
input is the second, 4-wire SA Out is the third)
Utilizing more than 60 endpoints may result in choppy audio. On IP connected
endpoints, you will see the blinking “Paired” icon as audio packets are lost. On
powerline, the bandwidth available is shared between equipment on that line and is
reduced the further you are from the HMS-4X. The number of bars of the powerline
icon indicates how much bandwidth you have. At two bars, or less, you will begin to
experience choppy audio.
Clear-Com has developed a powerline calculator to not only manage bandwidth, but to
also assist you in cable length and power limits. The calculator can be found here:
http://www.clearcom.com/userfiles/file/Software/HelixNetCablingCalculator/index.html#/
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