20 line ip pbx 1.Embeded ip pbx 2.Asterisk on ip pbx 3.With 4FXO, OR 8 FXO , OR 4 FXO OR 4FXS PORT

Extension:  

Create and management of extension (no limited) 

Free internal call(extension call extension)

Voice message

Call park

Call hold/retrieve

Call transfer(attendant/blind)

Call waiting

3-way calling

Make out bound call

Do not disturb

Call forwarding(follow me)

Paging

Call pick up

Ring group(loop/ring all)

IVR:

IVR recording and management

IVR rules for no limit IVR tree

Ring time setting

No answer rule and disposal

Upload IVR

Call management:

Call rule setting(dial plan)

Trunk setting

Incoming call disposal

CDR download

Conference: max 20 participants

Call center:

Multiple queues

No answer rule and disposal

Multiple ring and answer rules

Incoming service concurrent call limitation

System management:

Back up to/restore factory from local IP PBX or PC

Back up to/restore setting from local IP PBX or PC

20 line ip pbx

20 line ip pbx