Dialogic® 4000 Media Gateway Features
5
Media Processing Features
Support for the following codecs:
o G.711 A-law and u-law
o G.726 (16, 24, 32, and 40 kbps)
o G.729*
o GSM-FR
o iLBC**
o sRTP
RTP dynamic payload audio/telephony event
RTP profile RTP/AVP
DTMF via RTP payload/telephony event (RFC 2833 or RFC 4733)
PSTN-side fax tone detection via RTP event (RFC 2833 or RFC 4733)
128 ms Echo Canceller supported on all boards, and additionally, 256 ms EC
supported on those boards listed in MultiPRI boards section.
Reliability:
o Load balancing and failover on PSTN side
o Load balancing and failover on SIP side (optionally uses OPTIONS for keep-
alive check)
o Alive check for active calls on SIP side via SIP session timer
*For G.729, you need to purchase and activate a license before you can use it. For more
information, see the Dialogic
®
4000 Media Gateway Series Quickstart Guide, which is
available at http://www.dialogic.com/manuals/dmg30004000. G.729 is only available on
Dialogic
®
Diva
®
Multiport V-PRI Media Boards.
**iLBC is only available on Diva Multiport V-PRI Media Boards. On Dialogic
®
Diva
®
V-
4PRI/E1/T1-120 PCIe HS boards and Dialogic
®
Diva
®
V-8PRI/E1/T1-240 PCIe FS boards, up to 18
channels for each PRI port are supported.
Supported RFCs
RFC 2617 - HTTP Digest Authentication
RFC 2833 - RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals
RFC 3261 - Session Initiation Protocol
RFC 3262 - Reliability of Provisional Responses in Session Initiation Protocol (SIP)
RFC 3264 - An Offer/Answer Model with Session Description Protocol
RFC 3265 - SIP-specific Event Notification
RFC 3326 - The Reason Header Field for the Session Initiation Protocol (SIP)
RFC 3389 - RTP Payload for Comfort Noise
RFC 3398 - ISDN to SIP mapping
RFC 3420 - Internet Media Type message/sipfrag
RFC 3515 - REFER method
RFC 3550 - Realtime Transport Protocol (RTP)
Komentarze do niniejszej Instrukcji