IP Phone

Call forward/ Caller ID
Call transfer (blind/attended)
Call holding/waiting
Flexible dial map
Empty calling no. reject service
Black list/ White list
BLF/ No disturb/ Speed dial/ SMS
4 line keys defined as multi line with screen display, or used as SIP line keys
Softkeys/ Function keys programmable
8 DSS keys
IAX2 line key
SIP authentication (none, basic, MD5)
Phonebook 500 records
9 kinds of ring type and 5 user-defined music ring
Incoming calls /outgoing calls /missing calls(100 records for each).

IP Phone System Integration
Conference call park
Call pickup
Paging and intercom
Redial and unredial
Click to dial
Secondary dialing automatically
CLIR (reject the anonymous call)
CLIP (make a call with anonymous)
[4:09:39 PM] ATA: Dial without register