Cisco Headend System Release 2.7
Data Transmission Options
4017541 Rev B
3
Data Transmission Options
Service providers may choose to configure their plant to use one of the following
data interface cards:
data interface cards:
Asynchronous Serial Interface (ASI)
-
Direct ASI does not use a BIG
-
Inband data is sent directly from the DNCS to the BFS QAM and secondary
QAMs through an ASI interface using a splitter or a multiplexing (MUX)
device
QAMs through an ASI interface using a splitter or a multiplexing (MUX)
device
SWIF
-
SWIF requires the use of a BIG
-
Inband data is sent through the asynchronous transfer mode (ATM) interface
-
A media converter or a MUX device is required to convert SWIF input to
another QAM input, such as ASI
another QAM input, such as ASI
Notes:
Most multiplexing devices convert SWIF input to ASI input, which provides a
method to manage and combine video streams. Instead of a multiplexing device,
you can use a media converter to convert the SWIF input to one of the other
QAM inputs, such as ASI. In either case, you cannot select SWIF as an input
source to the additional BFS QAMs.
method to manage and combine video streams. Instead of a multiplexing device,
you can use a media converter to convert the SWIF input to one of the other
QAM inputs, such as ASI. In either case, you cannot select SWIF as an input
source to the additional BFS QAMs.
The DNCS cannot send inband data through the ATM and ASI interfaces
simultaneously.
simultaneously.