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
