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packet over SONET
(redirected from Packet over SONET/SDH)

    Also found in: Wikipedia 0.03 sec.

packet over SONET

A metropolitan area network (MAN) or wide area network (WAN) transport technology that carries IP packets directly over SONET transmission without any data link facility such as ATM in between. Packet over SONET is intended to transmit data at the highest rates possible, because SONET has a smaller packet header overhead than ATM (28 bytes out of an 810-byte frame compared with 5 out of a 53-byte ATM cell). However, ATM has traditionally provided proven management and quality of service (QoS) for long haul transport. See RPR.

Transporting IP
In a LAN, IP generally runs over Ethernet. In a WAN, it typically is transported by ATM, which rides over SONET, and increasingly, directly over SONET. In the future, it is expected that IP will run directly over DWDM fiber (rightmost diagram).



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To enable the transition from these networks to 10 Gigabit Ethernet, Force10 today introduced a 4-port multi-rate OC-3c/OC-12c/OC-48c packet over SONET/SDH line card that allows service providers to select between speeds on a per port basis.
Force10 Networks TeraScale E-Series Anchors New Service Provider ... by Business Wire
Force10 Networks(R), the pioneer in building and securing high performance networks, today announced that it is fundamentally altering service provider network economics by integrating multi-rate packet over SONET/SDH (POS) technology into the TeraScale E-Series(R) family of switch/routers.
Force10 Networks Transforms Service Provider Network Economics With ... by Business Wire
The line of Multi-Services Modules integrates the feature set of Ixia's highly successful 10 Gigabit Ethernet LAN Services Module (LSM), applying these features to the testing of Packet over SONET/SDH (POS), Ethernet over SONET, and to the testing of 10 Gigabit Ethernet networks.
Ixia Announces Multi-Services Modules for Testing Next Generation ... by Business Wire
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