The Avaya IP Office platform is the ultimate in converged voice and data technology. IP Office brings a combination of voice and data applications formerly reserved for only the largest corporations. Cutting edge customer service with easy to use tools is now available to the smallest of businesses.
VoIP Protocols
The H.323 Stack within the core software supports the following protocols:-
H.323 (V2)(1998), Packet-based multimedia communications systems
Q.931, ISDN user-network interface layer 3 specification for basic call control
H.225.0 (1998), Call signaling protocols and media stream packetization for packet-based multimedia communication systems
RTP/RTCP
H.245 (1998), Control protocol for multimedia communication
Audio CODECs:
G.711 A-law/U-law
G.723.1 MP-MLQ
G.729 Annex A - CS-ACELP (Not supported by NetMeeting)
Silence Suppression
Fax Relay
Local End Echo Cancellation 25ms (except transparent - no cancellation)
Out of band DTMF
Internet Standards/Specification (in addition to TCP/UDP/IP)
RFC 1889 - RTP/RTCP
RFC 2507,2508,2509 - Header Compression
RFC 2474 - DiffServ
Performance
The following table is the maximum ratings tested in the lab. For deployment we recommend that more bandwidth be made available for normal data.
56K
64K
128K
256K
2M
LAN
G729.1 (8k)
4
5*
6
18
20!
20
NetCoder (8k)
4
5*
9*
18!
20
20
G.723 (6.4k)
5
5*
9
18
20
20
ADPCM (32k)
1
1
6
5
20!
20
G.711 (64k)
X
X
1
3
16!
20
Transparent (64k)
X
X
1
3
14!
20
* - data transfer is affected at higher channel connectivity
! - channel connectivity at higher levels is affected by data transfer
