3190IB is compact feature rich enterprise IP phone supplying 2 line, BLF, many call features, HD voice, SIP and IAX2, automated provisioning. highlight points are:
-28x64 pixel graphic LCD, with 3 softkeys for better user-friendly operation;
-line registered 2 independent SIP accounts;
-programming keys (as Speed Dial, or Busy Lamp Field, Presence Watcher).

Phone Feature
Multi-language
Flexible Dial Map: Fix length; End with #; Dial with time out
Multi-ringer selectable and user-defined ringer update via web
Speakerphone
Phonebook
RJ9 Headset
Dial Map Table
5 Speed dial keys with BLF option.
Black list for reject authenticated call
Reject incoming call
Limit dialing out No. list
No Disturb
Caller ID, call forward, call transfer, call hold, call waiting, call forward with unconditional, busy and no answer,3 party conference

SIP
RFC Protocol Edition: RFC3261 and RFC2543
Compatible with all major SIP Servers: Cisco, Osip, Vocal, ser, Partysip, SIMENS, Grandstream, etc.
Server authentication mode: none, basic, MD5
Peer to Peer SIP call
Line 1/ Line 2.Support two different SIP servers.
DTMF Mode: RFC2833, RELAY, SIP INFO
DNS name of SIP server
SIP signaling port setting
NAT traverse, STUN
NAT traverse, SIP Express router
Pulic and private SIP server
Dual-backup server

Physical & Environmental
Desktop / Wall mounting
Power Input: 100 to 240 ACV / 50/60Hz Output: 5 DCV
Dimensions: 210 x 170 x 45 mm
Weight: 680 g (main unit)
Operating Temperature: 0°to +40°C (32°to +104°F)
Storage Temperature:-20°to +70°C (-40°to +158°F)
Humidity: 5% -95% non-condensing