PWG acts as a dual mode mobile phone offering seamless voice and data connectivity to multiple communication networks viz. GSM/GPRS, WiFi and VoIP. To access these networks and use the features offered, users can make use of existing Bluetooth enabled PDA/Notebook devices.

Bluetooth

• Bluetooth is used as front-end connectivity between PDA and PWG. Using Bluetooth, PWG can be used to make/receive calls, browse internet and for configuration purposes
• Data transfer between PDA and PWG is done using Bluetooth Serial Port Profile.
• Dial-Up Networking profile connects PDA to either GPRS or WiFi networks thus enabling internet browsing on PDA
• Headset profile (HSP) connects to PWG and can be used to make/receive calls from GSM or VoIP. It also has a feature of transferring a call to or from a PDA
• Cordless telephony profile (CTP TL) has been implemented to make use of a third party network through any standard CTP Gateway
• Secured connection between all connected Bluetooth devices using Bluetooth pairing

GSM

• Dual SIM, Quad Band GSM
• Conformance with standards for GSM AT command set (07.05 and 07.07)
• Provides Call Control features
• SMS and Phone Book handling
• GPRS: Mobile Station Class B

WiFi

• WiFi confirms to IEEE 802.11b standard
• Supports up to 128 bit WEP for security
• Provides 802.1x Authentication
• Automatic or manual selection of hotspot

VoIP

• VoIP confirms following standards:
- SIP - RFC 3261
- SDP - RFC 2327
- RTP - RFC 1889
- RTP AV Profile - RFC 1890

• Codecs supported: G.711a, G.711u, G.723.1, G726 and G.729ab
• Call Control features, DTMF generation
• Seamless voice connectivity while roaming