The Nokia E60 and its brothers, the E61 and E70, were first released in late 2005 and became available commercially in the first half of 2006. These phones herald a new era of mobile connectivity as they are among the first "fusion" cell phones that join low-cost (or even free) Wi-Fi VoIP communications and ubiquitous standard wireless cell service.

All three phones are full featured cell phones supporting the global GSM standard (in US compatible with Cingular and T-Mobile networks), high-bandwidth 3G networks and support of the Blackberry enterprise server. And all three work with Nokia's SIP stack, giving the phones powerful VoIP features that, until now, have only been available on non-cellular Wi-Fi handsets from Linksys, UT Starcom, D-link and others.

The advantages of cellular and VoIP services in one device are fairly obvious. First is coverage: The phones work equally well where the cell phone signal is weak (interior of buildings, offices) but Wi-Fi is available and in areas with no Wi-Fi signal but good cell phone coverage. Second is cost: VoIP over a Wi-Fi saves bundles over cell service and avoids usurious roaming charges when traveling.

While all three phones offer similar Wi-Fi capabilities, they differ significantly in form and function. The Nokia E60 is the classic "brick" type phone that has become Nokia’s trademark. The E61 is a much wider device (similar to a RIM Blackberry in design) and comes with a readily-accessible full QWERTY keyboard. The E70 is slightly larger than the E60 and offers a 2.0 megapixel camera and a QWERTY keyboard that "folds" open.

All three phones are more complex than your typical cell phone, and taking advantage of some advanced features could pose a configuration challenge to the uninitiated. This is particularly true for VoIP usage. Current firmware versions have only limited NAT support and require use of "reverse NAT" on the SIP registrar side to successfully traverse NAT. Nokia promises the phones will support more common VoIP NAT traversal methods such as STUN (by the end of 2006), TURN and ICE (both next year).

In this story we focus on the proper configuration of a Nokia E60 with an Asterisk PBX, the popular open-source telephony server, though the instructions should work with no changes on the Nokia E61 and E70 models.

Our setup will allow us to:

• Make a call over Wi-Fi whenever available and use GSM as a backup option;
• Configure a certain set of predefined Wi-Fi access points, such as Home or Work, when they are available. The phone will automatically connect to one of the access points and register with an Asterisk server;
• Receive all calls using a single phone number. If at the time of the call the Nokia phone is connected to the Asterisk server via WiFi, the call will be routed to it via the internet protocol. Otherwise, the Asterisk server will connect the call over the GSM network (some network charges might apply for incoming call).

This article assumes you already have a working Asterisk server running and that you are able to make and receive phone calls. We will also assume that you either run the popular asterisk with freePBX so that you can configure your asterisk via the freePBX web interface. If not, you will have to edit the the appropriate Asterisk configuration files (sip.conf, extensions.conf, etc) manually.

Please Follow Link For Setup Guide : http://forum.voxilla.com/voip-wiki/using-nokia-e-series-phones-asterisk-24215.html