IP0120/IP0121 User Manual
5
1.2
Key Features
•
Following H.323 version 4 standard ( IP0121 ) :
o
Support Fast start, Tunneling and H.245 DTMF relay.
•
Following RFC-3261 SIP standard (IP0120) :
o
Support password authentication using MD5 digest and RFC-2833 for
DTMF relay.
•
Dynamic IP support (DHCP and PPPoE) :
o
Getting IP from DHCP server using DHCP protocol or through ADSL
modem using PPPoE protocol, automatically reconnect when PPPoE
lost connection.
•
Passing through NAT devices:
o
Can make outgoing and incoming calls under any NAT devices (even
under two layer NAT devices) when working with the specific
gatekeeper/proxy devices.
•
Remote software upgrade capability (via ftp):
o
FTP protocol provides reliable remote upgrade through Internet.
•
Advanced Digital Signal Processing (DSP) technology to ensure superior
audio quality:
o
Hardware System on a Chip solution with built in DSP processor
makes sure the perfect voice quality.
•
Support G.723.1, G.729A/B, G.711 (A-law/U-law) voice codecs :
o
Following ITU-T standard to support best compatibility.
•
Support supplementary services, including immediate (unconditional) call
forwarding, busy call forwarding, no answer call forwarding and call
hold/transferring.
•
Provide call history:
o
Record incoming call history, outgoing call history, missed (not
accepted) call history, and let users make direct call from the call
history.
•
Phone Book : 50 sets
•
Speed dial : 10 sets
