Alcatel Carrier Internetworking Solutions 1850 TSS-5 User Manual

Alcatel-Lucent 1850 TSS-5 Transport Service Switch

4

1850 TSS-5: Where TDM  

and Ethernet Services Coexist

The 1850 TSS-5 is a compact, modular, optical transport 
switch with the functionality to carry TDM traffic from 
1.544 Mb/s interface/2.048 Mb/s interface (T1/E1) to 
optical channel level 12 (OC-12), and packet traffic from 
10 Mb to Gigabit Ethernet (GigE). It is recommended for 
use where TDM and Ethernet services coexist. 

Less than 125 mm (5 in.) tall, the 1850 TSS-5’s small 
footprint is designed to extend optical transport to the 
customer premises. It is ideal for mobility backhaul 
from the cell site and for fiber-to-the-business (FTTB) 
and end-user-access applications. The 1850 TSS-5 is 
environmentally hardened, making it suitable for  
mounting in outdoor cabinets or at cell towers. 

Pseudo-wire support of circuit emulation services (CES) 
makes the 1850 TSS-5 ideal for cell-tower backhaul and 
the smooth transition from TDM to third-generation 
mobile system (3G) and fourth-generation mobile system 
(4G) networks. It has small form-factor pluggable (SFP) 
optics, allowing the optics to be purchased separately  
from the circuit packs and plugged in when additional 
interfaces are needed. This design lowers initial capital 
expenditures (CAPEX), making the 1850 TSS-5 capacity 
easily scalable.