Alcatel-Lucent 1850 TSS-3 manual Network SONET/SDH network, Ethernet over PDH

Figure 3 shows the 1850 TSS-3 in an EoPDH configuration, installed with CPE in a standard building or at a cellular tower. In each case, there is a pre-existing copper connection capable of carrying an E1/DS1 channel or an E3/DS3 chan- nel connected to a legacy synchronous optical

network (SONET)/SDH network.

By inserting the 1850 TSS-3 into the copper connection, EoPDH is established. Ethernet packets are mapped to the PDH lines using a standards-compliant mapping mechanism, VCAT/ GFP, with redundancy provided by PDH 1+1 protection. If several E1/DS1 or E3/DS3 lines are available, they can be bonded together to create a higher-bandwidth uplink.

Figure 3. Ethernet over PDH

Demarcation

Wireless Access		Ethernet over E3/DS3
Equipment
Ethernet/	1850 TSS-3	Legacy PDH/SDH
FE/GigE	Service Provider
		Network
	Equipment
Customer		Ethernet over E31/DS1
Equipment Ethernet/	1850 TSS-3
FE/GigE

In Figure 4, the 1850 TSS-3 is in the Ethernet extension configuration. In this configuration, electrically- based FE or GigE is converted to optical Ethernet for transmission over longer distances than are possible with copper lines. Transmission complies with the Ethernet in the first mile (EFM) standard, bringing the service provider’s Ethernet domain right up to the customer’s building or cell site.

Figure 4. Ethernet extension

Demarcation

Wireless Access		GigE/FE with EFM OAM
Equipment		Metro Ethernet
Ethernet/FE	1850 TSS-3
		Network
	Service Provider
		(Ethernet or MSPP
	Equipment	or CWDM-based)
Customer		GigE with EFM OAM
Equipment Ethernet/FE	1850 TSS-3

Alcatel-Lucent 1850 TSS-3 Transport Service Switch 5