RAD Data comm IPmux-16 Manuel D’Utilisation

IPmux-16 Installation and Operation Manual

Chapter 1 Introduction

Functional Description

1-9

When there are several bundles from different sources at the same E1/T1 port, the

bundle that will be used for adaptive clock regeneration for the port is the first

bundle of every port. For example (E1): Bundle number 1 for port 1, bundle number

32 for port 2, bundle number 63 for port 3, bundle number 94 for port 4, etc.
In this mode the regenerated clock is subject to network Packet Delay Variation and

may not comply with jitter and wander specifications.

IPmux-16

E1/T1

IPmux-16

E1/T1

Adaptive Mode

Loopback Timing Mode

IPmux-16

E1/T1

Adaptive Mode

Master Clock
Source Device

Remote Loopback

Timing Devices

IP over
Ethernet

Figure 1-7. IPmux-16 in Adaptive Timing Mode

Frame Format

The Ethernet frame sent by the IPmux-16 is a UDP datagram which transfers E1/T1
payload bytes over IP over Ethernet (UDP payload + UDP header + IP header +

Ethernet header).
The UDP payload size is equal to TDM bytes per frame (TDM bytes/frame

configuration).
The illustration below specifies the structure of the different headers, special fields,

and the payload in the Ethernet packet.

MAC

UDP

Payload

Figure 1-8. TDMoIP Frame Structure

Note