VOIP

Blueface VOIP trunk providers in Ireland

VoIP for your Home

Blueface have many call plans to suit a wide range of calling habits so finding a call plan that suits you is easy. All our packages are ready to use instantly: the moment you buy a plan you can start making phone calls. All of our products are self-install so this means no installation charges or engineer fees.

VoIP for your Business

If you want to start making great savings on your business call costs you need to make the switch to VoIP. It works just like your traditional landline service except all your calls are be made through your broadband connection at a fraction of the cost.

All Blueface business plans are available and ready to use instantly plus you can still use your existing phone handsets. We'll also give you a new phone number (or more if you need them) that you can call from any phone.

Why Use VOIP

VOIP is a very usefull tool in todays communication world. You can have telephone lines, extensions to remote workers, and linking office's making them as one telephone system, allowing internal calls between extensions, transfering lines from one site to another.

If you have a reasonable quality Internet connection you can get phone service delivered through your Internet connection instead of from your local phone company.

We recommend that you use VOIP in addition to traditional phone service, since VOIP service providers usually offer lower rates than traditional phone companies,

VOIP

VOIP is an acronym for Voice Over Internet Protocol, or in more common terms phone service over the Internet.

Types of IP Network

The speech quality depends on the type of IP network in use. Managed IP networks provide better speech quality compared to unmanaged networks such as the Internet, where quality of service cannot be guaranteed.

Examples of recommended IP networks

• Digital Leased Line

• IP-VPN (Virtual Private Network)

• Frame Relay

Not recommended

• Internet (including an Internet VPN)

Note

If packet communication cannot be established between the respective networks. In this case, you

need to configure the network settings (e.g., a VPN router when using an IP-VPN) to establish packet

communication.

• Unlike an IP-VPN, which is set up over a network provider’s own IP network, an Internet VPN is set up

over the Internet. Internet VPNs are not recommended for VoIP communication because transmission

delays and loss of data are likely to occur.

Bandwidth Assessment for Virtual IP Extension

Required Bandwidth per IP Telephone for a Call

The required bandwidth depends on what combination of codecs and packet sending intervals is used. Keep

in mind the following points about the type of codecs and packet sending intervals, in terms of speech quality:

• The speech quality of the codecs varies as follows: (High) G.722, G.711, G.729A (Low)*1

• The shorter the packet sending interval, the higher the speech quality.

• The higher the speech quality the IP telephones provide, the more bandwidth the IP telephones require.

*1 When the preferred codec of each party differs, the call will be established using the lower codec. For example, if the caller prefers

G.711 while the called party prefers G.729A, the call will be established using G.729A.

Required Bandwidth for Each Virtual IP Extension

To allow all IP telephones to make calls simultaneously, it is necessary to keep available the bandwidth required

by a IP Extension with the maximum number of IP telephones connected.

Codec	Packet Sending Interval
Codec	20 ms	30 ms	40 ms	60 ms
G.722*1/G.711	87.2 kbps	79.5 kbps	—	—
G.729A	31.2 kbps	23.5 kbps	19.6 kbps	15.7 kbps

O'Byrne Telecommunications

E-mail:info@obtsystems.com

Loughboy Park, Kilkenny, Ireland