PTMP

Products PMP
1

DOES THE PTMP 450 COME OUT WITH FIBER CONNECTION INSTED OF NETWORK RJ45

2

The 450 platform does not currently have a fiber (or SFP) connection.  The interface for power and data is Ethernet (RJ-45).

You can see all of the interfaces in the PMP 450 Planning Guide here.

Thanks,

Matt

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3

Hello,

Perhaps with a conversor rj45-fiber?

We have lots of problems with this PTMP in the towers with broadcast TV/Radio. FTP doesn't work properly and there are inductions that means on lots of CRC or ping lost - BAD Service

And also 600SS Surge Suppressor are being unnistalled in our installations because of the inductions they receive.

We are thinking on fiber to LAN conversors... 

Regards,

4

We've delt with ethernet issues on/near high power FM radio towers and have a few tips that seem to help:

  • It's nearly impossible to collocate any WISP radios on an AM tower, just avoid them if possible.
  • Try to mount your WISP radios as far away from high power FM as possible.
  • We use double shielded cable (has both foil and braided) along with higher gauge cable 24AWG.
  • Use shielded connectors that allow you to terminate the ESD drain wire in the CAT5.
  • Try as hard as possible to make sure that the cable shielding is crimped in the RJ45 and not outside the RJ45.
  • Sweep your cable run with a gigabit ethernet tester that actually pushes data over the cable before you plug it into the radio.
  • If you're collocating in a bunker with FM equipment, try using shielded cables with shielded ends between your equipment... e.g. PoE to Switch and Switch to Router. Try putting all your equipment in an enclosed, metal cabinet.
  • Loop both ends of the ethernet a few times around a clamp on or toroid RF choke.
  • If using inline ethernet surge protection, try removing either the radio side, or the bunker side, or both.
  • Try using AUTO-100mbps FDX operation instead of AUTO-1gbps FDX operation.
  • In extreme cases you could run the ethernet in a metal conduit up to the radio(s) on the tower.
1 Like
5

another alternative  (follow all of erics advice, its all spot on!)  and move your copper switching to the top near your radios. use a metal grounded enclosure too

we've got one site thats well past ethernet reach and sent 110v power up the tower to small cabinet and ended up with 10' or shorter runs to radios.   battery backup is on the ground. 

 here is some extreamly hardened cables you may want to look at... the price tag is a little rough though.

https://www.belden.com/resourcecenter/documents/upload/Industrial_Ethernet_Cable_Solutions_Brochure.pdf

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6

I have been down this road and paid the price to get it fixed.  Shield the crap out of everything and ground the crap out of everything.  Locate your ethernet runs away from FM coax running up the tower and my advice is to use a combo of Superior Essex Copper Clad cat5e or cat6 cable -pricey but worth it - and use snap on ferrite cores that match the diameter of the cable.  We used 12 ferrite cores at each end and grounded the copper clad at the bottom of the tower.  I have also seen where putting ferrite cores on the power cords of backhaul POE injectors fixed negotiation issues.   Knowing what I know now, my advice is to also stay away from FM towers  altogether if possible.  Moving the box up the tower will usually fix anything unless the FM coax is leaking near the top of the deployment.  For some reason the PMP 450 is expecially sensitive to FM from my experience with it.  Shield and ground well. 

7

And make sure that you have a solid electrical ground between wherever your radio is and your switching equipment. 

If you happen to have any current going over the ethernet shielding (usually the case in FM towers) you'll see all sorts of inexplicable behavior. Check if  disconnecting the grounding in one of the ends of the cable improves SNR in the copper link. 

The sollution is to usually to run a 4-6mm² grounding cable parallel to the offending ethernet drop cable(And DC ground the radio on top to the same grounding your switch is on), run the cable inside metallic ducting, or both. 

I have some(3) Gig ethernet drops that run parallel to 100KW of FM power (3inch coax). They run inside flexible metallic ducting (parallel to the FM feedline) for about 40M, without any CRC / negotiation trouble for the past 4 months (since the radios were changed).