SIP

Skype benefits and drawbacks

Some quick notes for an upcoming interview.

Benefits

  • free voice calls between Skype users
  • easy multi-person conferencing (up to 50, depending on bandwidth)
  • multi-platform -- works on Windows, Mac, and Linux
  • first IM client for many users who use voice feature first
  • easy file sharing
  • can have "real" phone numbers in many locations
  • can also use video (various solutions, Windows only for now)
  • Skype on your phone -- Microsoft PocketPC has a Skype client, EQO is new and works on Symbian Series 60 and other Java capable phones (client currently requires Windows on desktop)

Disclaimer: EQO is a local Vancouver company that I've met with, and my company Bryght powers their online community forums. They're also the only mobile app other than ShoZu that made my jaw drop (well, until I found out about the desktop client requirement...boo!).

Drawbacks

  • have to have Skype to communicate (or pay for SkypeOut)
  • built on a closed network, closed protocols (as opposed to open standards like SIP or JINGLE)
  • computers on open networks might be used as a SuperNode, consuming lots of bandwidth
  • Skype (now bought by Ebay) is the only provider of the service

Other forward looking options include click-to-buy or click-to-access solutions -- use your Skype ID and the client to pay for online goods and services, including restricted access to online content -- enter your Skype ID into a web form, get messaged with a special code, complete a transaction, receive an access code -- voila! instant online access. Note: this is of course possible with any IM service or even SMS, and Jabber is doing this today. In many ways, Skype is JAIS -- Just Another Identity Store -- that happens to have VoIP/IM/etc. built on top of it as an application.

Why the Nokia N91 is delayed: Voice over WLAN support?

There are a bunch of us (Scott, James, and Chris, too, once we told him the specs) that are lusting after the Nokia N91, but it is supposedly delayed until the first quarter of 2006.

Some background on the specs: this phone is a pretty high end unit, including a 4GB hard drive (store tons of music, photos, etc.), standard headset jack (use your killer headphones to listen to the music), 2MP camera (almost decent enough quality to leave your low-end digital camera at home) AND, the big one, built in Wi-Fi of the 802.11G flavour.

It's this last that is interesting. Nokia has already said that is working on Voice over WLAN: see Time Europe -- "2006 will be a big year for [mobile] wi-fi" and vnunet.com -- "replacing mobile and desktop phones with series 60 Nokia smartphones could make IT management easier". So, my guess is that they are specifically holding back the release of the N91 so it can be one of the flagship phones to include this functionality.

Mac Asterisk community, and dial Skype from your Address Book

Benjamin Kowarsch emailed me to give me the thumbs up on mentioning this. Ben's company, Sunrise Tel, have been putting together graphical front ends and configuration wizards for the Asterisk IP-PBX running on Mac OS X.

There is now a placeholder website at Astmasters.net -- "where the Macintosh Asterisk community meets". Of particular interest, if you request an account on the Macintosh Asterisk Mailing List, you can get a free VoIP account:

Regular members of the Macintosh Asterisk Mailing List may apply for a free account on the Astmasters VoIP service. This service supports both SIP and IAX and is predominantly intended for Macintosh Asterisk users to test connectivity and to be able to call other list members free of charge. However, it is also possible to make and receive calls to and from other networks.

Account holders will be provided with an Astmasters.net SIP URI which can be called from any SIP compliant IP phone. Regular PSTN telephone numbers can be called, provided that the numbers are E164 directory listed. Both VoIP calls and VoIP to PSTN calls are free of charge. User controlled Do-not-disturb (DND) is provided by default and incoming voicemail will be sent by email.

Astmasters VoIP Service

Ben is going to be completing peering with Free World Dialup as well. Oh, if only I had a few weeks to focus on nothing but Mac VoIP for a while...

Unrelated from Asterisk on Mac, I just found out about Jon's Phone Tool, an immensely scriptable application that lets you do all sorts of phone-related things from your Mac. Including, dial via Skype from your Address Book. Check it out.

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