13
Proprietary Information: Not for use or disclosure except by written agreement with Calix.
© Calix. All Rights Reserved.
Broadband Overlay
The E7-2 can be used when traditional POTS already exists and is passed through the remote
location, originating from the access equipment located in the CO or an existing remote
DLC. The DSL overlay is passed through an integrated splitter / combiner, allowing the
delivery of voice, video, and data to a customer across a common, twisted pair cable. The
Calix E7’s GE uplinks may be aggregated on a C7 with GE-2p / FE-4p or GE-4s line cards
or on an Ethernet switch or router.
Overlay POTS Services with VDSL2-48
All 48-subscriber ports on the VDSL2-48 line card provide broadband DSL access and
access to overlay lifeline POTS service. Analog POTS is carried over the service loop using
standard Voice Frequency carriers (300 to 3400 Hertz). A line card integrated voice splitter
separates the voice from the data service for each subscriber signal, extracting the POTS
service, as an analog signal, back out of the line through the POTS overlay connector ports.
The analog POTS service can then be handled via a collocated Digital Loop Carrier (DLC),
or sent off to a TDM switch analog front end line bay.
POTS interfaces of the VDSL2-48 line card have the following characteristics:
Impedance of 900 Ω + 2.16 μf
Loop current of up to 25mA (during normal operation), and 18mA (during battery backup)
E3-48C Node
48x Combo DSL and POTS ports, two 1GE / 2.5GE SFP MSA sockets, and two
1GE/10GE SFP+ MSA sockets
The Calix E3-48C is a compact, hardened, high capacity sealed ESAN designed for
outside plant applications.
The E3-48C may be AC, DC, or Line powered.
E5-48 Overlay Node
Fixed 1RU form factor
48 x VDSL2/ADSL2+ Fallback
Integrated POTS splitter per port
