On peut être passionné par la téléphonie et prendre soin de soi : "Faites du sport, faites du vélo" est la devise du site d'e-commerce lancé par l'un des auteurs de Panoramisk : bikeo. Si vous faites du vélo, que ce soit en ville, sur la route ou sur les chemins plus accidentés, n'hésitez pas à aller faire un petit tour sur www.bikeo.fr pour vos prochains achats verts.
En plus leur plate-forme de téléphonie utilise Asterisk, comme quoi on peut la convergence est une réalité.

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1. Do you already have a telephony system?
2. Is your IP network ready for voice?
3. Do you have analog equipment or lines?
4. Is your voice installation split on multiple location?
5. Are you using wireless phones on your system?
6. Do you need a call billing feature?
7. Are you planning an outsourcing process of the telephony system?
8. Does telephony needs to be linked to computer systems?
9. Are you planning to exchange voice over IP traffic with telcos or partners?
10. Are you using a call-center?
11. Are you monitoring or recording your phone calls?
12. Are you using a automated call system?

4- Is your voice installation split on multiple location?

Once the organization is split in multiple sites, this can be at a local, national or international scale, IP telephony is becoming really interesting from an infrastructure and a cost perspective. A site could be from large to a single phone line site, in this case we can talk of tele-workers which are really good candidate to IP telephony.

In traditional telephony, we generally install a central system at each location and needs to interconnect each of these to the local PSTN company or to use private links that can be expensive and hard to set-up. In this case it is really complex to have small sites fully integrated to the whole telephony system. Each telecom link between sites should be sized to accept traffic peaks but are so expensive when no phone calls are in transit. The IP data network will help in reducing these cost by sharing the available bandwidth between multiple application.

IP telephony requires an IP network. The distributed model allows to install a single IP phone at a remote location and use all infrastructure resources from a central site, as soon as an IP path is available. It is also possible to have an IP telephony infrastructure on each site and put these together to build a wide voice network. Thus it is possible to adopt a “grow as you need” approach when a site is either expanding or shrinking. At the extent, a single user could easily be connected to the central site on its IP link with only an IP phone.

But, as soon as we are using an IP network to transport multiple application flows, quality of service becomes a key point (see question 2). We also have to take care of the network itself, an outage on this one could have major impacts if voice traffic is transported for important users¹. Backup networks should be installed when necessary, and PSTN is one of these, keep it in mind.

1. aren’t all phone users important? [↩]

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