Most SIP devices, such SIP phones, can support “call waiting” service themselves. But for some old SIP devices, such as some simple SIP ATA devices, it is required PBX to provide “call waiting” service.

So we upgrade MSS to V13.6 to provide this service. In MSS, we name it as “simple call waiting” service because MSS’ call waiting service only support

(1) put original call into waiting queue if current called party is busy.

(2) reconnect previous calls if current called party is available.

So user cannot press ‘R’ key to switch calls. It is simple and we hope it can fit most customers requirements.

Please refer to our service document for more details:

http://www.myvoipapp.com/docs/mss_services/call-waiting/index.html