RAD Data comm IPmux-1E Spécifications télécharger pdf (Page 35)

IPmux-1/1E Installation and Operation Manual Chapter 1 Introduction

Functional Description 1-15

Network Timing Schemes

The following paragraphs describe typical timing schemes and the correct timing

mode settings for achieving end-to-end synchronization.

External Network Timing

When the edges of the network are synchronized by an external network clock

source, all the IPmux-1 units should be configured to work in loopback timing

mode (see Figure 1-13). This topology enables any-to-any connectivity.

E1/T1 Device

E1/T1

Clock from External Distribution Network

IPmux-1

E1/T1 Device

E1/T1

LBT Mode

IPmux-1

E1/T1 Device

E1/T1

LBT Mode

E1/T1 Device

IPmux-1

LBT Mode

IPmux-1

LBT Mode

IP/Ethernet

Figure 1-13. IPmux-1 in Loopback Timing Mode

External timing from the network can also be issued to IPmux-1 by External Clock

input; in this case, the E1/T1 device will use the LBT mode.

Clock from External Distribution Network

IPmux-1

E1/T1

E1/T1 Device

LBT Mode

E1/T1 Device

IPmux-1

External

Clock Mode

External

Clock Mode

LBT Mode

IP/Ethernet

Figure 1-14. IPmux-1 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-1 devices is configured to work in Loopback timing mode, while the other

IPmux-1 device is configured to work in Adaptive timing mode (see Figure 1-15).

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RAD Data comm IPmux-1E Spécifications Page 35

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