| [PBX] Call Drops We have 15 VOIP phone lines, and app 15-20 computers that connect to internet using Wifi/Ethernet connection.
Problem we are facing is call drops. previously we had a 50*5 coax connection with combined voice and data traffic, and call drops was at peak. Then i added another 15*2 coax connection and moved all the voice traffic to 15*2 connection. and we did not experience any call drops. now company wants to switch to Optical Fiber, and we added 15*15 optical fiber connection. Combined the voice and data traffic and we are experiencing the issue again.
Voice traffic counts towards uploads, and i am not sure what is causing call drops again since now we have 15mb/s available. Can any one suggest what could be the solutions? |
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aguenPremium
join:2003-07-16
Grants Pass, OR Reviews:
 ·Callcentric
 ·Verizon FiOS
| Without knowing specifically what the 15-20 computers are doing network wise at any given point in time, I would suggest that you implement QOS on the PBX/Voip protocol at your gateway/router in order to prioritize the voip traffic over everything else. You might want to segment the voip network from the PC network as well. |
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garys_2kPremium
join:2004-05-07
Farmington, MI | reply to farukh123
15-20 PCs can easily max. out a 15 Mbps connection. If you have the option to add a separate line just for voice, do it. Otherwise, you'll have to start using QOS on your router. |
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| reply to farukh123
well QOS may help
you need to have the call traffic treated as a higher priority by your firewall/router compared to other traffic
however incoming responses from the web (for example) can swamp your connection momentarily - no router can control what is being sent to it (incoming traffic) - it can only react to what it does with the traffic at that point - which does not always help you at that point
so, try QOS and if that does not work, you need to segment your network or get 2 separate ISP lines as you did
get a router/firewall that is designed for VOIP traffic shaping and not just the cheapest thing you can find - you are not running a single residential line
from what you wrote, I think you will need an IT pro to work with you with experience with VOIP etc. - otherwise this will be an uphill battle for you - that is a big part of what we do for businesses |
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| what router would you suggest? Currently i am using ASUS N56U router. I do not think it is the cheapest in market, but i am willing to try something better than this.
I have already applied QOS, and given high priority to phone IPs. |
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| you never said how many wired vs. wireless etc.
you need to work with someone - seriously - this is going to be uphill for you
I would not use that router for your situation at all. That is a fast wireless router (actually quite fast) but just a single wireless router. That is not what you need.
You need to separate your wireless clients from the primary router (which should be something different). You need a wireless access point (or a wireless router like the one you have set to "bridge" mode) and connect it to your primary router if you will only use a single ISP connection.
Your wireless clients will be handled by the access point and wired into the primary router. The primary router will not have to spend any time processing wifi traffic itself (the wireless aspect of the traffic).
I would recommend a Cisco router like RV016 as a primary router
or McAfee Firewall Enterprise or Juniper J2320 etc.
I'm trying to recommend smaller routers as you probably do not want a super expensive gigantic router for only 16 users.
You can also program ports on your router (or on a switch if it is a "managed" switch which is more expensive) to go at a different speed. Cheaper routers do not let you configure individual LAN ports. For example, you can limit your users to 10BaseT speed on ethernet or enforce even stricter rationing of bandwidth as necessary. Remember even 10BaseT speed is about the same as your full internet bandwidth for your entire network!
Also, really depends on what your users are doing. If they are heavy bandwidth users (large files, video, etc.) you need to re-assess pronto. Otherwise, you may be able to control the situation.
Make sure if you are assigning priority to traffic that you know what ports you are giving priority. Don't assume any "voip" setting on a router is automatically going to be right for you. It probably just means port 5001 or something. You may not be using that. I have no idea what your voip setup is.
Thats as much as I can spare to say right now. Good luck. its up to you. But get rid of that router or at least relegate it to being a wireless access point only. |
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| reply to farukh123
final comment
you are using a router that was really designed for home users
and ASUS is not really a great routing company, probably uses an open source router system like DD-WRT for its firmware - that is fine on its own, but not implemented in the way you really need for several users and lots of VOIP lines |
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| reply to farukh123
final final comment
the router you have sells for $85 -$125, so just use it for your access point if you like, it can't do the job, and not just because of its low price, its not what you need
15 VOIP lines and PC users at same time requires some thought and config with 1 ISP line incoming, get the right gear to begin with
best to you |
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| reply to farukh123
We've given up trying to manage bandwidth for SIP trunks on Internet connections used for other purposes. Unless your ISP support QOS end to end, it's nearly impossible (as previously mentioned) to control inbound bandwidth and a handful of PCs can easily swamp very fast connections.
At this point we're recommending a separate Internet connection for SIP trunks, or a PRI with an interface card or box. |
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