VP-12, VP-12P IP phones. Operation manual
7
Main features and capabilities
VoIP capabilities
Supported protocols
•
SIP
Quantity of accounts
2
Key features
•
2 SIP accounts configuring independently
•
Support for up to 4 redundant SIP servers
•
Flexible dialplan
•
Operation without a SIP server
•
Caller name and number displaying (CallerID)
•
Mute
•
Redial
•
Different ring-tones for different accounts
•
Call History
•
Local phonebook for 200 phone numbers
•
LDAP Remote Phonebook
•
Speakerphone mode
•
Operation behind NAT
•
Short text messages transmitting and receiving (SIP MESSAGE)
Operation behind NAT
•
NAT keepalive
•
STUN mode
•
Public IP
Security
•
SIP over TLS
•
SRTP
Voice features
•
Echo cancellation, G.165, G.168 (AEC) recommendations
•
Voice activity detector (VAD)
•
Comfort Noise Generation (CNG)
•
DTMF signals detection and generation
DTMF signals detection and
generation
•
Inband
•
RFC2833
•
SIP INFO
Codecs
•
G.711
а
•
G.711u
•
G.723.1
•
G.726
•
G.729