RAD Data comm IPmux-11 - Manual (Page 22)

Chapter 1 Introduction Installation and Operation Manual
1-8 Functional Description IPmux-11 Ver. 2.00
Figure 1-4. IPmux-11 in External Clock Mode
Single Source Clock Network
When a common clock is not available on all the ends of the network, one of the
IPmux-11 devices is configured to work in loopback timing, while the other
IPmux-11device is configured to work in adaptive timing (see
Figure 1-5 ).
Figure 1-5. IPmux-11 in Adaptive Timing Mode
Frame Format
TDMoIP
The Ethernet frame sent by IPmux-11 is a UDP datagram that transfers E1/T1
payload bytes over IP over Ethernet (UDP payload + UDP header + IP header +
Ethernet header). The UDP payload is equal to TDM bytes per frame
(TDM bytes/frame configuration).
Table 1-2 specifies the structure of the different
headers, special fields, and the payload in the Ethernet packet.
CRC TDM Payload CW UDP IP ETH
Figure 1-6. TDMoIP Frame Structure