Specifications

Installation and Operation Manual Chapter 1 Introduction
IPmux-8/16 Ver. 6.00 Functional Description 1-15
The illustration below specifies the structure of the different headers, special fields,
and the payload in the Ethernet packet.
MAC IP UDP CW
Payload
Figure 1-14. TDMoIP Frame Structure
Table 1-1. TDMoIP Frame Structure
Field Length Field Notes
7 bits Preamble
1 bits SFD
6 bytes Destination MAC Address
6 bytes Source MAC Address
2 bytes Type IEEE 802.1p&Q VLAN Tagging
(additional 4 bytes if enabled)
1 byte Vers/HLEN
1 byte Service Type
2 bytes Total Length
2 bytes Identification
1 byte Flags/Fragment Offset (most)
1 byte Fragment Offset (least)
1 byte Time to Live
1 byte Protocol
2 bytes Header Checksum
4 bytes Source IP Address
4 bytes Destination IP Address
2 bytes UDP Source Port The UDP source port field is
used to transfer a destination
bundle number. See Note
below.
2 bytes UDP Destination Port
2 bytes UDP Message Length
2 bytes UDP Checksum
IP Layer
MAC Layer
UDP Layer
LLC Layer