NEC UNIVERGE NEAX 2000 IPS Reference Manual page 266

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