10 Sipgate SIP connections on one ADSL connection?

Posted on 2014-02-06
Last Modified: 2014-02-13
We have two ADSL connections into one router which can prioritise traffic based on port numbers and/or dedicate one of the ADSL connections to the SIP data.

However, both connections are only 8 Mbps download and about 0.75 Mbps upload.

We'd like to use Sipgate's "Sipgate Team" product to have 8 to 10 users, so upto 10 SIP phones (something like the Snom 320 handset).  

I don't imagine that more than 4 or 5 users would ever actually be using the phone at the same time.

Does anyone have experience of having so many VoIP phones on such a relatively poor connection?  Is it likely to work?  Anything we can look out for that might give us problems?
Question by:RedLondon
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
LVL 18

Accepted Solution

Garry Glendown earned 500 total points
ID: 39841185
Short answer: No.

Long answer: Depends on the bandwidth of the ADSL lines and the number of concurrent calls. Unless you use a highly compressed Codec, you should calculate an active channel with ~100kbit/s. So with 4-5 active calls (and priority for voice data), you could get bye with 500kbit/s bandwidth ... with your numbers, up to 8 calls would possibly still work, albeit I'd expect problems once you hit 7... (not sure how well your router is able to distribute the calls to the two lines ... I'm always a bit skeptic about load balancing on those kind of lines ...)
Also ensure that your latency to Sipgate should be well below 100ms, with minimal packet loss ...

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Router speed limit 7 105
do not call list 1 42
Unable to enable HWIC 2FE 2 31
FreePBX Recordings 1 9
Hey there Heard about jingle, the add on for XMPP that enables point to point audio between two XMPP clients. No server config necessary. Actually quite a cool feature. However, how good is it if you can not use those voice capabilities to do a P…
In the hope of saving someone else's sanity... About a year ago we bought a Cisco 1921 router with two ADSL/VDSL EHWIC cards to load balance local network traffic over the two broadband lines we have, but we couldn't get the routing to work consi…
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question