[asterisk-users] RS485 Audio device

Sylvain Rochet gradator at gradator.net
Wed Nov 2 15:30:22 CDT 2016


On Wed, Nov 02, 2016 at 04:21:07PM -0400, Eric Wieling wrote:
> If cable can be pulled , you have a couple of options.
> Long Reach Ethernet from Cisco is rated for 5,000 feet. Multi-mode fiber
> with fiber/ethernet media converters on each end would work and electrically
> isolate the two ends of the cable. Both are way overkill from a capacity
> standpoint, but sometimes there's nothing wrong with overkill. Put an ATA on
> the far side.

We are using Westermo products for this case. Westermo DDW-120 is rated 
up to 15 km (@ 192 kbit/s), higher speed is indeed achieved for shorter 

It's not cheap, but it works well, even in harsh industrial 

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