"The TSoP Smart SFP[TM] processes the SONET/SDH signal with full transparency, maintaining payload structure, protection protocols and synchronization end-to-end; this simplifies the configuration and service turn-up of SONET/SDH connections across a packet network
," says Pieter de Boer, Managing Director at AimValley.
With enhanced radio performance and advanced networking capabilities, the BCM85620 provides radio-optimized traffic delivery, including robust clock delivery over packet networks
needed for network synchronization.
Clocks get reset in a packet network
via a timestamp exchange between a master clock to one or more slave clocks.
The solutions demonstrated conformance when tested under ITU-T G.8261, a standard defining testing methodology and accuracy criteria for clock transport over packet networks
. G.8261 includes network impairment scenarios to simulate more realistic network conditions.
Because T.30 was designed for circuit-switched networks, it cannot correct the delay, jitter and packet loss inherent in packet networks
. While T.38 is required to implement FoIP with the reliability of TDM fax, a strong T.30 implementation is also required for reliable fax communication around the world.
Different standards groups are actively investigating synchronization in packet networks
. The most relevant work is carried out in the IEEE, where a new standard is being developed based on the IEEE 1588 Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, which was finalized in 2002.
My analysis focuses on the core packet network
, due to its essential role.
The next challenge for operators is to integrate the installed base of existing SONET/SDH access networks into the same packet network
There are other implications of moving to a packet network
. TDM services are tied to a very stable reference clock.
Providing real-time voice service over a packet network
presents a series of challenges that are not present with "normal" data traffic.
"For Acme Communications, the MetaSwitch VP3500 provides all the traditional Class 5 features and services that customers expect along with the compelling economics, and advanced converged voice and data applications of a packet network
CTC's Cisco Powered IP+ATM packet network
and its 450 member sales and service teams, provide contiguous marketing and technology coverage throughout the Northeast and Mid-Atlantic States.