Do I have enough bandwidth for Centrex VoIP-PBX?Below is the average bandwidth available based on the most popular delivery methods. Remember bandwidth used for data transmissions will have an effect on the number of concurrent calls supported. However, these numbers can be used for estimating if a customer possesses enough bandwidth to support Centrex VoIP-PBX. A bandwidth testing tool should be used to gauge the true amount of bandwidth each organization has, but for rough estimates, these numbers will work. Centrex VoIP-PBX requires approximately 20Kb/s of free upload bandwidth per concurrent call.
For getting an accurate view of your company’s available bandwidth, run the test at the following website to see your actual internet connection speed. http://www.dslreports.com/stest?loc=97 Upload speed is what is important with Centrex VoIP-PBX. If you do not have enough upload bandwidth to support the number of concurrent calls you would like, you will need to upgrade your connection or add another one. Is my network ready for Centrex VoIP-PBX?If you will need more than 2 phones in a location, there may be the need for a Quality of Service (QoS) Router onsite. If your current switch/router supports QoS, make sure that this feature is enabled. In some cases a firmware upgrade may be necessary to enable QoS support. Check your switch/router manufacturer’s website to see if this is available. QoS prioritizes voice packets over data packets so in times of high network traffic, the voice quality is not affected. If you do not possess a QoS capable switch/router, then you may need to purchase one.For organizations with 15 or more users, Domatic recommends that the customer possess a router(such as the Cisco 2611)that supports QoS/Priority Queuing, as well as a managed switch that supports VLAN and 802.1q trunking(such as the HP Procurve 2600 Series) so that the phones can be on their own VLAN and have their voice traffic prioritized over the normal data traffic on their internal network. Without a QoS device on your network, voice traffic may become choppy at times. Some networks with fewer users may also require a router capable of QoS. The Linksys BEFSR81 is a possible solution to perform QoS for smaller networks. What QoS device, if any, that needs to be used, is all dependent on individual network traffic. Is my Internet Connection reliable enough to support Centrex VoIP-PBX?Go to the Command Prompt from any computer on your network and type the following command:ping voice.domatic.com The results will give you numbers for Minimum, Maximum, and Average Latency. If the number for Average is 50ms or less, then you are good to go. If latency is greater than 50ms, then you may need to switch broadband providers before you can reliably use Centrex VoIP-PBX. Here are a list of broadband providers that test well with Centrex VoIP-PBX:
Approved Routers for Centrex VoIP-PBX service:
Routers with known issues:
What do I need to know before I can quote a Centrex VoIP-PBX solution?
With that information, you are now ready to quote a solution. Click on the Centrex VoIP-PBX Sign-up link at the top of the page to obtain a quote online. |
Voice Over IP:
Residential & Business:Hosted PBX/VoIP Systems:Contact Information:
 The Domatic ATA (Analog Telephone Adaptor) brings traditional telephones to the networked world. It is a handset-to-Ethernet adaptor that interfaces regular analog telephones with IP-based telephony networks. The Domatic ATA supports two telephone lines. |