How do I ensure good quality VoIP phone calls for my business?


VoIP phone systems don’t use traditional analogue or digital phone lines that have a physical metallic connection between the on-site phone system equipment and the local telephone exchange.

Instead, the phone lines of a VoIP system are connected via the internet to phone system equipment that is owned and operated by a VoIP Service Provider and is situated in a data-centre in the internet cloud.

Therefore the key to ensuring good quality VoIP calls  is to give careful consideration to the design and configuration of the end-to-end connection between the on-site VoIP equipment  and the VoIP Service Provider’s equipment.

Many businesses believe that all that is required is a good quality reputable VoIP Service Provider.

While that is a pre-requisite for a good-quality fully-featured VoIP service, the reality is that even the best VoIP Service Providers have little control over the quality of the end-to-end connection.

It is only consultants and systems integrators (like Premitel) who can ensure a good quality VoIP service by designing and integrating each element of the end-to-end connection in such a way that the VoIP data packets are routed between your telephone equipment and the VoIP Service Provider’s equipment with minimum delay and packet loss.

Therefore the simples way to ensure that you have a good quality VoIP service for your business is to get in touch with Premitel.

If you are considering making the switch to VoIP without our assistance then you should consider carefully the individual elements of the end-to-end connection as follows:

  • VoIP Service Provider
  • Internet Service Provider
  • Network Equipment
  • Transmission Infrastructure
  • Telephone Equipment

Each of these elements is discussed briefly below.

VoIP Service Provider

Our preferred VoIP service providers have been providing high quality VoIP services for over 10 years.

They offer SIP trunks and feature-rich hosted VoIP PBX services that meet the operational needs of most businesses.

In addition their service charges and call charges are very competitive.

Internet Service Provider

Our preferred Internet Service Provider has a peering arrangement with our preferred VoIP Service Providers.

This means that VoIP data packets are routed directly, and therefore with minimum delay and packet loss, from the Internet Service Provider’s network to the VoIP Service Provider’s equipment.

In other words the data packets do not traverse the general internet where they are beyond the control of the Internet Service Provider and could be subject to congestion and therefore delay.

Our preferred Internet Service Provider also gives highest priority to VoIP data packets that have been suitably “tagged” by our chosen Network Equipment or Telephone Equipment.

Again this means that VoIP data packets are transmitted between the end-user router and the VoIP Service Provider’s equipment with minimum delay and packet loss.

In fact we would refuse to implement a VoIP Service that did not incorporate our preferred Internet Service Provider (and VoIP Service Providers) for the simple reason that we would get regular complaints about call quality.

Network Equipment

Our advice on the choice of router, switch and other network equipment would depend very much on the requirements of the end-user.

There are many issues to consider when choosing the most appropriate network equipment.

One of the main issues would be whether the internet connection is to be shared with other internet applications or whether VoIP would have its own dedicated internet connection.

Whatever the specific requirements of individual customers, we would insist that network equipment is deployed that can be (and is) configured to give priority to VoIP data packets when being transmitted both within the on-site network and across the gateway router to our preferred Internet Service Provider.

We can offer a complete network design and implementation service or we can advise a customer’s existing network support resource.

Transmission Infrastructure

The Transmission Infrastructure is the cabling and other media used to connect the VoIP Telephone Equipment to the Network Equipment.

If standard Cat5e cable is used then there is usually no impact on VoIP, but if other media are used such as wireless bridges or HomePlug then there may be an adverse impact on the transport of VoIP data packets.

We can assist with, or advise on, the most appropriate transmission infrastructure.

Telephone Equipment

[We consider here only VoIP telephone equipment that is connected directly over the internet to a hosted VoIP phone service rather than via on-site VoIP telephone systems.]

Our preferred VoIP Telephone Equipment brand is Yealink, mainly because we have experience configuring Yealink phones to operate effectively with our chosen VoIP Service Provider.

Yealink phones also make it relatively straightforward to attach the quality-of-service tags to VoIP data packets that are recognised by our chosen Internet Service Provider.

In general our experience is that Yealink VoIP phones are reliable, easy to use and relatively inexpensive.

Our preferred cordless VoIP brands are Gigaset and RTX.

Both these brands offer cordless DECT VoIP solutions that can meet the requirements of most businesses including those that requite coverage over a large area with multiple DECT base units and seamless handset roaming from base to base.

Get in touch with Premitel if you have a specific requirement or if you wish to discuss how your business could make better and more cost-effective use of its existing telecommunications and internet infrastructure and services.