ismart

ismart is SIP client softphone that let you use your Android smartphone to make an extension call.
ismart supports AMRNB and SILK codec for better voice quality over mobile network.
It is used in conjunction with iSmartBiz service.

Basic Features
ismart has a basic features of a business telephone, including the following:
* Call via NTT-HIKARI and Japanese ITSP(050 Number)
* Integrate mobile phones into your office's phone extension network.
* Integrate Contacts into ismart.
* Integrate Call history into ismart.
* Call hold, attended transfer, park hold.
* Onetouch-key dial. (Speed dial)
* Re-dial by pressing dial button for a while.
* Ring tone settings.
* Bluetooth headset. (Only voice input/output available)
* Multi Domain. (Can be registered to two SIP server)

Application Consideration
* ismart might not receive a phone call immediately via mobile network due to its condition or specification.
* ismarte drains battery faster.
* You might meet a problem if you use ismart and another VoIP application such as Skype at the same time.
* Please subscribe flat-rate monthly charge service which enables economical use of packet communications.
* Android OS might disconnect it from Wi-Fi on sleep mode. This disables ismart from receiving incoming call.
* For improving the application, the access log to iSmartBiz is preserved in a server. And the information which specifies an individual isn't acquired.