Pseudowires (PW) are a way to emulate a native service (e.g. PDH, SONET)) over a Packet Switched Network (PSN). The pseudowire is used to re-create, as far as possible, the properties of a single passive wire that can carry the native service traffic.

Circuit Emulation (CE) is a sub-set of Pseudowire technology that is specifically aimed at making ATM networks look like a collection of private circuits. Typically the circuits being emulated are of the T1/E1 type.

The AT6000 is a three device family that provides complete pseudowire protocol coverage including SAToP, CESoPSN, MEF-8, CEP, ATM pseudowires (PW), PPP PW, HDLC PW, Ethernet PW. Thalassa also provides the ability to handle concatenated ATM streams for ATM switch/aggregation and dedicated ATM pseudowire. Many legacy protocols: DS0, DS1, E1, DS3, E3, SONET/SDH, ATM, IMA, HDLC, PPP, FR, MLPPP, Ethernet may be tunneled concurrently within the supported PW connections over PSN networks. Thalassa can connect to a wide range of PSN networks including IPv4, IPv6, MPLS, and Ethernet.