legend2
join:2003-04-27
Hackensack, NJ | Bandwidth requirement for 6 VoIP lines
Hi, I'm just wondering if our office covad dsl line Speed (Download/Upload) 1500 Kbps/ 384 Kbps is enough for 6 simultaneous outbound calls using either Packet8/Vonage/Voicepulse ?
Thanks. |
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Automate
join:2001-06-26
Atlanta, GA
 ·Comcast
| After overhead your 384Kpbs probably yields no more than about 330Kbps. 330Kbps/6 = 55Kbps per line with nothing else like outbound e-mails going on. Vonage can probably work with this with the bandwidth saver turned on. Only one port of the ATA can be in low bandwidth mode at a time so you would have to use one line per ATA. Packet8 compression seems to be a little better than Vonage They support their's over dial-up speeds. With Packet8 their would be a little more bandwidth left over for e-mails etc.
If you are going to use these with a PBX, be aware that Packet8 does not support inbound DTMF right now. So a user dialing in from outside would not be able to navigate their PBX voicemail with their phone keypad.
I would recommend getting a router that has QoS, at least the 8 port Linksys or maybe something better. I would also start with a couple of lines and see how it works before you switch all 6 over. |
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ieee1394
Premium
join:2001-08-25
Washington
 ·TowerStream
| reply to legend2
Re: Bandwidth requirement for 6 VoIP lines
This setup is unlikely to work. Before you spend too much time thinking about you need to verify that you are actually hitting those speeds consistently. It's dsl so it's unlikely that you are. But if you were then you also need to consider what Automate pointed out in that you'd be hitting past the roof on your bandwidth needs (your 6 phone lines would take up more bandwidth then you have never mind about anything else you might want to do with your connection at the time).
I think you'd be way better of springing for a full t-1 or switching to SDSL if you want to pursue this. You might not save as much as you had planned but at least you've got all of that extra bandwidth then. |
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Automate
join:2001-06-26
Atlanta, GA
·Comcast
| You may also want to look at something like »www.cbeyond.com they provide a full T1 and then split the traffic between internet and VOIP dynamically. They don't offer service in your area but maybe you can find someone that does. Cbeyond is in the $500-$600 range for a full T1, 5 phone lines and like 2000 minutes of LD. There are quite a few companies that provide voice over T1. Most of them fix the split between voice and data. With Cbeyond if you are not using voice you have a full T1 for data. |
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clecrupt9
join:2002-01-22
GA
| reply to legend2
In addition to the above, DHCP and Quality of service have to be worked out before you implement this in a business. The ATA will dhcp cycle while on a call, after about 2 minutes from DHCP request. I wonder how long it will be before someone makes a devise for these multiline applications. |
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Automate
join:2001-06-26
Atlanta, GA
·Comcast
| said by clecrupt9  :
I wonder how long it will be before someone makes a devise for these multiline applications.
Multitech makes them with 4 and 8 ports but at the price they charge I don't know if they get many takers. It may be a while before Vonage would support something like this. It would be neat to try one with FWD.
»www.multitech.com/PRODUCTS/MultiVOIP/ |
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JasonZoom
join:2003-02-24
Fort Myers, FL
| reply to legend2
First, Multitech is expensive, their email customer service sucks, and the configuration method is archaic and unreliable. Nonetheless, their products do the job.
Now on topic, don't even think about 6 Vonage lines over your connection. I have a 768/128 connection, and ALWAYS get these speeds. 1 Vonage line works like a charm - no delay and great quality. 2 lines (even with bandwidth saver) and the system breaks down. Dropped packets are a serious problem. I even bought a Linksys QoS router, and I still have problems at least half the time when two calls are in progress (and no other traffic, http, email). |
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Automate
join:2001-06-26
Atlanta, GA | Did you have two ATA's both on Vonage with bandwidth saver?
If Packet8 will work over a dial-up I would think two lines would work over 128K. |
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JasonZoom
join:2003-02-24
Fort Myers, FL
| Yup, two ATAs. Let's put it another way... I can't even make 1 Vonage call and one SIP FWD call from a softphone at the same time.
And again, I am getting full advantage of my connection. I checked...
Even on 30Kbps BWS with Vonage, there is a significantly higher rate of upstream transmission. I don't understand it, but it is there. |
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legend2
join:2003-04-27
Hackensack, NJ | I'm just wondering if I subscribe Optimum Online business service with 1mb uplink and 6mb down could have 4-6 IP lines works normally? |
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JasonZoom
join:2003-02-24
Fort Myers, FL
| reply to legend2
In theory, you should be able to run somewhere between 11 and 70 lines depending on many factors. However, you whether you decide on 5 or 55, you will need Quality of Service built in to your IP network hardware. This is especially true if you are using the link for data as well (which you presumably are).
To answer your question directly, yes - but... |
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