NEC UNIVERGE NEAX 2000 IPS - Page 266

Chapter 13 Voice Over IP (VoIP)
Page 13- 24 UNIVERGE NEAX 2000 IPS Request for Proposal (RFP) Reference Guide
Issue 6
Required bandwidth for FAX Connection
• 32IPLA-A/16VCTA-A
Connection Conditions Required Bandwidth (One-way)
T.30, G711, Payload=40ms
150 kbps (estimated)
T.30, G729a, Payload=40ms, Communication
speed=14.4Kbps
(No IP Header compression in Router)
23.6 Kbps (FAX Payload=78byte)
T.30, G729a, Payload=40ms, Communication
speed=14.4Kbps
(with IP Header compression in Router)
16.6 Kbps (FAX Payload=78byte)
• 8IPLA/24IPLA
Connection Conditions Required Bandwidth (One-way)
G.711 pass-through, Payload=40 ms
(No IP Header compression in Router)
72 kbps (FAX Payload=320 byte)
G.711 pass-through, Payload=40 ms
(with IP Header compression in Router)
65 kbps (FAX Payload=320 byte)
G.726 pass-through, Payload=40 ms
(No IP Header compression in Router)
40 kbps (FAX Payload=160 byte)
G.726 pass-through, Payload=40 ms
(with IP Header compression in Router)
33 kbps (FAX Payload=160 byte)
Note: The data in the above tables does not include MAC Header.
Required bandwidth for Modem Connection
Connection Conditions
Payload
length
IP Header
compression in
Router
Required
Bandwidth (One-
way)
40 ms 72 kbps
30 ms 74.67 kbps
20 ms 80 kbps
G.711 pass-through
10 ms 96 kbps
40 ms 40 kbps
30 ms 42.67 kbps
20 ms 48 kbps
G.726 pass-through
10 ms
No
64 kbps
40 ms 65 kbps
30 ms 65.33 kbps
20 ms 66 kbps
G.711 pass-through
10 ms 68 kbps
40 ms 33 kbps
30 ms 33.33 kbps
20 ms 34 kbps
G.726 pass-through
10 ms
Yes
36 kbps