I sent him the One X portal PDF and spoke with a ONE X engineer.
VoIP bandwidth requirements
Transport network 100 kilobits per second (kbps) per VoIP user in each
direction (100 kbps in and 100 kbps out)
End-to-end average packet
delay
120 ms
Average jitter Less than 20 ms
The VoIP bandwidth requirements for Avaya one-X® Portal are similar to the bandwidth
requirements for Avaya IP telephones and other Avaya IP applications. Avaya recommends
that you test the VoIP bandwidth requirements for each Avaya one-X® Portal deployment
because network and other conditions can impact bandwidth use.
The VoIP component in Avaya one-X® Portal uses 8-KHz, 1-byte sampling without
compression. Avaya estimates that the following guidelines apply to VoIP bandwidth use:
• If 1000 VoIP users talk simultaneously to internal telephones, the bandwidth requirements
are 100 mbps in each direction.
• If 1000 VoIP users talk simultaneously to outside telephones, the bandwidth requirements
are 200 mbps in each direction.
However, when considering this bandwidth use, you must make allowances for packet collision
on local network segments. During Avaya one-X® Portal activity, Avaya estimates the following
network traffic:
• An active Avaya one-X® Portal user can use up to 16 kbps of bandwidth when performing
actions, such as logging in, making calls, listening to messages, and looking up contacts.
You can consider this to be peak traffic.
• When a user is idle, and gets a call or message approximately every 5 minutes, bandwidth
use drops to about 1.6 kbps. This traffic occurs.
