T.38

Description

This indicates an attempt to use the T.38 protocol.
T.38 is an ITU standard for sending FAX across IP networks in real time. The FAX messages are sent via UDP or TCP packets. The media type is image/t38.

Affected Products

T.38

Impact

Unexpected network communication

Technology

Browser-Based, Network-Protocol, Client-Server, Peer-to-Peer, Cloud-Based, Mobile-Device

Behavior

• Reasonable

Default Ports

• TCP/6004
• UDP/6004

References

• https://www.ietf.org/rfc/rfc3362.txt