Hardware Description
2-2
SmartLine 16 User’s Guide
SL16s have hardware speed detection. An SL16 monitors all
connections. Only those devices matching its own speed setting are
allowed to insert or remain inserted onto the ring. A flashing red
LED indicates when an associated port has Autowrapped because of
a non-matching speed setting. Once inserted, the SL16 no longer
monitors the RO port, because only a cable break would activate the
backup path (the receive side of the Ring Out).
NOTE:
When used in a MAUi or StackLynx-Plus satellite application, the
SL16 should always have the hardware speed detect enabled in
your management software.
Switch 2 (RI EN). You enable the Autowrap (loopback) feature of
the Ring In port with this switch in the enabled (down) position.
Loopback occurs when a cable break occurs on the main ring (RI
and RO port connections) and refers to operation using the backup
path. SmartLine devices can automatically switch to the backup path
with a main ring cable break and return to the primary path after an
associated repair.
NOTE:
You must set this switch in the disabled (up) position when
you connect the SL16 to a “dumb” or non-powered MAU.
Otherwise, the SL16 cannot function.
Automatic loopback requires the presence of all TX and RX
connections (both primary and loopback) in the RI and RO
cables, and that all attached devices comply with the Andrew
standard for RI/RO Autowrap.
Switch 3 (RO EN). All the statements made for Switch 2 and the
associated Ring In ports also apply to Switch 3 and the Ring Out
ports.
Switch 4 (SAT MAU). SmartLine 16 Intelligent MAUs may be
managed either by the SmartLine Manager software or by an
Andrew Intelligent Controller, such as the MAUi products or
StackLynx Plus.
