Functional Description - Cisco GS7000 Installation And Operation Manual

General Information

Functional Description

Functional Description
The node is used in broadband hybrid fiber/coax (HFC) networks.
The node receives forward optical inputs, converts the input to an electrical radio frequency (RF) signal, and
outputs the RF signals to up to four ports. The forward bandpass frequency is from 54 MHz to 1218 MHz.
The lower edge of the passband is primarily determined by the frequency split of the diplex filters and the
reverse amplifier assembly.
The Cisco GS7000 Intelligent Node will contain a Cisco Remote PHY Device (RPD) in lieu of the optical
receivers and transmitters which have been used in previous versions of the GS7000 nodes.
The RPD will allow for a single forward/downstream path to be split to up to 4 RF ports. The reverse/upstream
path can combine all 4 RF ports onto a single upstream signal or can be split into 2 upstream paths via a switch
in the node. No change of a configuration module is required to switch from a combined to segmented reverse
path as with earlier GS7000 nodes.
The Remote PHY module communicates with the headend/hub via the Small Form Factor Pluggable (SFP)
device which plugs into the module. This transceiver is the optical port for all forward and reverse traffic
to/from the Intelligent Node.
45 - 90 V AC input power is converted to +24.5, +8.5, -6.0, and +5.5 V DC by an internal power supply to
power the node.
Cisco GS7000 Super High Output Intelligent Node Installation and Operation Guide
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