Specifications

Chapter 1 Introduction Installation and Operation Manual
1-12 Functional Description IPmux-24 Ver. 1.5
Table 1-1. TDMoIP Frame Structure
Field Length (Bytes) Field
7 Preamble
1 SFD
6 Destination MAC Address
6 Source MAC Address
2 Type
1 Vers/HLEN
1 Service Type
2 Total Length
2 Identification
1 Flags/Fragment Offset (most)
1 Fragment Offset (least)
1 Time to Live
1 Protocol
2 Header Checksum
4 Source IP Address
4 Destination IP Address
2 UDP Source Port
2 UDP Destination Port
2 UDP Message Length
2 UDP Checksum
4 Control Word
... Data
4 CRC
IP Layer
ETH Layer
UDP Layer
Data Layer
LLC Layer
Note: IEEE 802.1p&Q VLAN
Tagging (additional 4 bytes if
enabled)
The UDP source port field is
used to transfer a destination
bundle number. See
Note
below.
ETH Layer