TANDBERG D13192 User Manual
Technical Description of
TANDBERG Gateway
with software version G2
D13192 Rev. 02
13
4.1.5.7 Layer 4 Ports used in H.323
The following tables describes which layer 4 ports are being used by the TANDBERG
Gateway when a call is made on an H.323 network.
Gateway when a call is made on an H.323 network.
TANDBERG Gateway meetings + Duo Video
Function Port
Type
Gatekeeper Discovery (RAS) 1719
UDP
Q.931 Call Setup
1720
TCP
H.245
Range 5555—5587
TCP
Video Range
2326—2837 UDP
Audio
Range 2326—2837
UDP
Data/FECC
Range 2326—2837
UDP
4.1.5.8 IP packet sizes
Audio
The TANDBERG Gateway can receive up to 60 ms of audio in each packet. The
TANDBERG Gateway is sending 20 ms of audio in each packet, thus:
The TANDBERG Gateway can receive up to 60 ms of audio in each packet. The
TANDBERG Gateway is sending 20 ms of audio in each packet, thus:
• G.711
– 160 bytes per packet
• G.728
– 40 bytes per packet
• G.722
– 160 bytes per packet
• G.722.1 – 60 bytes per packet
Video
The TANDBERG Gateway is sending maximum 1450 bytes of video per packet.
Note:
In addition, the system needs to add the following header information for each of the audio
and video packets above:
20 bytes IP-header, 8 bytes UDP-header and 12 bytes RTP-header (i.e. 40 bytes in total).
The TANDBERG Gateway is sending maximum 1450 bytes of video per packet.
Note:
In addition, the system needs to add the following header information for each of the audio
and video packets above:
20 bytes IP-header, 8 bytes UDP-header and 12 bytes RTP-header (i.e. 40 bytes in total).