Introduction to the Stinger Compact Remote ATM DSLAM
Host hardware
The Stinger® Compact Remote ATM DSLAM Getting Started Guide
1-9
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The T1-IMA LIM—The T1-IMA LIM occupies a LIM slot and provides T1
interfaces that support upstream links for end-user traffic when a control module
is used to support stand-alone operation of the Stinger CR ATM DSLAM unit.
Physical connections of the T1 interfaces are provide by an associated LPM.
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Line protection modules (LPMs)—The LPMs provide protection for the unit from
transient conditions on the subscriber lines and facilities to the central office.
LPMs with splitters, designed for the Stinger CR ATM DSLAM, combine analog
voice service from the central office and DSL service from the Stinger on the
same pair of wires to the subscriber. This LPM is also used to connect the T1-IMA
LIM to the physical T1 line facilities.
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Cooling unit—The cooling unit contains a fan and electronics to control and
monitor its operation. This fan maintains airflow to distribute heat produced by
the Stinger CR. The cooling unit also monitors, controls, and provides power to
an external ventilation fan, mounted in the side of the enclosure.
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Power supply—The power supply co190Vdc and -190Vdc provided from
the central office into -48Vdc needed to operate the Stinger CR.
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-48Vdc Power supply—The power supply supports the use of native -48Vdc
needed to operate the Stinger CR.
Host hardware
A hosted Stinger Compact Remote ATM DSLAM unit depends on an 155Mbps optical
link to a host Stinger unit. This link depends on the COP installed in the Stinger CR
ATM DSLAM chassis and an OLIM installed in the host Stinger unit. Each OLIM in a
host unit contains six 155Mbps optical interfaces and can support connections for up
to six hosted Stinger Compact Remote ATM DSLAM units.
A Stinger host must contain at least one installed OLIM to support optical
connections to Stinger CR ATM DSLAM units. These connections carry subscriber
data traffic from the CR ATM DSLAM unit and a control channel that integrates the
control and configuration of lines on RLIMs in the CR ATM DSLAM unit into the
management interface of the host Stinger unit. A single OLIM supports connections
for up to 6 Stinger CR ATM DSLAM units. and a Stinger host can support up to a total
of 30 remote Stinger CR ATM DSLAM units.
An OLIM can be installed in any LIM slot on a Stinger host unit. The installation
procedure is identical to the standard LIM installation procedure documented in the
Getting Started Guides for the Stinger FS, FS+, LS, and RT units.
Figure 1-5 shows a Stinger FS+ with OLIMs installed in LIM slots 1 and 16.