Grandstream has introduced us with a new device model. This new handset, according to characteristics, can rival Gigaset and Panasonic. The main advantage of this device is 4 simultaneous calls to one base, allowing a registration of up to 5 handsets.
we are a VOIP service provider for last 6 years ,providing pinless,callback,wholesale terminations, call center terminations,DID provider,ITFS,TFN and others. add me on skype:basskype2011.
msn(hotmail),yahoo:bas_tomar