Nortel HomeOffice II, User Manual

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Line Card Configuration Guide 7
June 1999 Description
Physical architecture
Introduction
At the corporate office (local site), the HLC requires all-digital trunking through
a T1, E1, or PRI link. The HLC is a digital line card designed to fit into a
Meridian 1 or SL-100 IPE shelf or Option 11 cabinet. The HLC meets the
electrical and bus interface requirements of this shelf. It has two serial ports: a
Man-machine Interface (MMI), and a Serial Data Interface (SDI). You can daisy
chain, or link, multiple HLCs through these ports, using one HomeOffice II Line
Card Multi-I/O Cable per HLC, so that all HLCs in the daisy chain can share a
single maintenance terminal. See page 28 for an illustration of a daisy-chained
system.
Corporate office (local) site
At the telecommuter’s corporate office site, the HLC plugs into an IPE module
or an Option 11 cabinet. The HomeOffice II Multi-I/O cable (see page 45)
supplies MMI and SDI connections to the HLC, and links multiple HLCs in
daisy-chained systems.
Home office (remote) site
At the telecommuter’s home office site, the all-digital line terminates into an
ISDN connection at the HomeOffice Router. The HomeOffice Router supplies a
MERIDIAN port (for connectivity to the digital telephone), the system’s
Ethernet port, and an analog port (for an optional, user-supplied fax machine).
The HomeOffice Router contains a Remote Daughterboard (RDB), which
supplies the system with its digital telephone interface.
The HLC allows as much as 65 milliseconds (ms) of network delay between
telecommuters’ corporate offices and their home offices. See page 3 for an
illustration of the elements of the HomeOffice II system and their relationships
to one another.