 |
| International
Private Leased Circuits |
|
|
|
Circuit types
Circuits routed by satellite are provisioned to provide the same level
of service availability as those routed by cable. Satellites have a
propagation delay, typically of 300 milli-seconds. Because of this,
circuits routed by satellite are unsuitable for use with certain types
of data transmission protocols, and echo cancellation is necessary for
circuits carrying voice. Routing with diversity is often provided via
satellite.
Data streams from different applications, such as voice, fax and computer
data, are normally combined for transmission and separated at the far
end by multiplexers and data compression devices. The capacity of the
circuit needed between the two sites is given by the sum of the requirements
for all the applications running between the sites. Multiplexers are
not provided as part of the service.
Circuit performance
International Private Circuits are designed to comply with ITU-T recommendations
on performance, with a target availability level of 99.5%. C&W makes
every effort to ensure the highest level of circuit performance. Responsibility
for circuit performance beyond the theoretical mid-point rests with
the overseas carrier.
|