Re: [c-nsp] DS3 Length over RG-6 or RG-59
On 9/22/10 10:31 PM, Jon Simola wrote: On Wed, Sep 22, 2010 at 1:31 PM, Peder pe...@networkoblivion.com wrote: Does anybody have a good rule of thumb as to what type of coax to use for DS3 over various distances? I know it has to be 75ohm, but have read it can be RG-59 or RG-6. I've only ever seen Coax 734 or 735 used in DS3 connections. 735 is good for 200 feet, 734 for up to 400 feet. RG-6 should work; I believe the Cisco DS3 cables are RG-6 with ferrites on each end and should be good up to 400 feet as well. I'll wander upstairs and pull the one I have in storage to double check. ~Seth ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] DS3 Length over RG-6 or RG-59
I was mistaken; the Cisco cable I have is Belden 9555 RG-59/U. ~Seth - Reply message - From: Seth Mattinen se...@rollernet.us Date: Thu, Sep 23, 2010 08:34 Subject: [c-nsp] DS3 Length over RG-6 or RG-59 To: cisco-nsp@puck.nether.net On 9/22/10 10:31 PM, Jon Simola wrote: On Wed, Sep 22, 2010 at 1:31 PM, Peder pe...@networkoblivion.com wrote: Does anybody have a good rule of thumb as to what type of coax to use for DS3 over various distances? I know it has to be 75ohm, but have read it can be RG-59 or RG-6. I've only ever seen Coax 734 or 735 used in DS3 connections. 735 is good for 200 feet, 734 for up to 400 feet. RG-6 should work; I believe the Cisco DS3 cables are RG-6 with ferrites on each end and should be good up to 400 feet as well. I'll wander upstairs and pull the one I have in storage to double check. ~Seth ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] DS3 Length over RG-6 or RG-59
On 9/22/10 1:31 PM, Peder wrote: Does anybody have a good rule of thumb as to what type of coax to use for DS3 over various distances? I know it has to be 75ohm, but have read it can be RG-59 or RG-6. Also, on the RG-59 I have seen solid core and braided. We have to run a cable about 250' to the telco equipment thru a messy ceiling, so we only want to do it once with the correct cable. In the lab, we just use cheap RG-59 but I don't know if it will have issues over a distance of 250'. Thanks. I would recommend 734 type cable which is designed for DS3. It is similar in size to RG-59 but made to better tolerances than you're likely to find in RG-59. It's available in figure-8 twin configuration specifically for DS3 transmit/receive. The cable you'll typically find these days sold as RG-59 is designed for TV distribution and often has copper-clad steel center conductor instead of pure copper as well as aluminum foil shield with drain wires instead of copper braid. Terminating this stuff with BNC connectors is a pain. It's designed for the F-type connectors used in cable TV. Also ensure that you use 75-ohm BNC connectors. The insulator is shaped differently than the normal 50-ohm type commonly available. -- Jay Hennigan - CCIE #7880 - Network Engineering - j...@impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
[c-nsp] DS3 Length over RG-6 or RG-59
Does anybody have a good rule of thumb as to what type of coax to use for DS3 over various distances? I know it has to be 75ohm, but have read it can be RG-59 or RG-6. Also, on the RG-59 I have seen solid core and braided. We have to run a cable about 250' to the telco equipment thru a messy ceiling, so we only want to do it once with the correct cable. In the lab, we just use cheap RG-59 but I don't know if it will have issues over a distance of 250'. Thanks. Peder ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
