Cisco Systems IPMUX-1E Single Source Clock Network, IPmux-1 in External Clock Mode

IPmux-1/1EInstallation and Operation Manual Chapter 1 Introduction

Clock from External Distribution Network

E1/T1 Device					E1/T1 Device
			IP/Ethernet		E1/T1
					E1/T1
		IPmux-1		IPmux-1
LBT Mode	External		External		LBT Mode
	Clock Mode		Clock Mode

Figure 1-12. 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 1-13).

	Loopback
E1/T1 Device	Timing Mode
Master Clock	E1/T1
	IP/Ethernet
Source Device
	E1/T1
	IPmux-1

Adaptive Mode		E1/T1 Device
		E1/T1
		E1/T1
	IPmux-1
		Remote Loopback
		Timing Device

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

			Adaptive
						Grooming
	ISDN
		IPmux-1E			LBT		of BRI LBT
						E1
			Adaptive					V5.1
						Megaplex
				IP over
	ISDN
						Grooming of FXS
				Ethernet	IPmux-8/16				Telephone
ISDN		IPmux-1E					in E1 CAS		Switch
			Adaptive

POTS IPmux-1E

Figure 1-14. IPmux-1E in Adaptive Timing Mode

Note Megaplex can also be connected directly to the network, via its TDMoIP main link (ML-IP).

Functional Description 1-15