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© 2001-2007 Calix. All Rights Reserved.
Video Services
Video Services may be provided by theses in two different formats.
RF Video
RF video is supported on a discrete path known as the VPON (Video Passive Optical
Network). The origin of the video comes from an RF Video HeadEnd. The RF signal enters
the optical transmitter and is multi-plexed into the GPON. The signal is converted to light
and “muxed” into the voice and data network using a Course Wave Division Multiplexor
(CWDM). The ONT converts the light back to the RF video signal. In this configuration, the
analog video service is totally independent of the Voice/Data/Digital video service
controlled by the shelf.
Switched Video Services (SVS)
SVS is an IP video solution. The video content is digitized and combined with the voice and
data traffic on the GPON. The origin of the video could be a digital feed by a content
provider or another source that can provide a digital video feed. The SVS signal is sent to a
data switch that combines this video signal with the data signal before forwarding it to the
shelf. The shelf combines the Voice, SVS and Data and converts it to light to be sent to the
ONTs via the GPON. The Model 560 sends the SVS and Data to the RJ-45 jack(s) for
output to the home.
Data Services
Data Services are provided by the system through the GPON module. The module has a
10/100/1000 Base-T Ethernet port which connects to a switch supporting the data and
Switched Video Services (SVS) content. The data is converted to light and sent to the ONTs
via the GPON. The Model 560 ONT converts the light back to the Ethernet signal and
outputs the signal on an RJ-45 jack.
Service Delivery
The F5 transport has at its core an ATM packet engine. To assist with Quality of Service
(QOS), different services are handled at different AALs (ATM Adaption Layers). Voice
Service is handled at AAL2, Dedicated Services are handled at AAL1 and Data Services are
handled at AAL5. The AAL5 layer incorporates prioritization of data packets, either High
(1), Medium (2) or Low (3) priority. Additional features (i.e. bandwidth) are provisioned on a
customer by customer basis through the CMS software.
