Hardware Description
2-5
Port LEDs (RI and RO and Lobe Ports 1 through 16). These
LEDs indicate the following:
Off
Port is wrapped (i.e., not inserted).
Steady Green
Port is inserted.
Flashing Green
Port is inserted, but speed detect is disabled by
management software.
Steady Red
Port is Locked (disabled) by management
software.
Flashing Red
Port has detected an improper speed and has
blocked access to the ring.
2.3 Front Panel Connectors
Figure 2-3 shows the front panel Ring and Lobe connectors. You can
purchase Andrew’s SmartLine 16 MAUs with either RJ45 or DC
connectors. SL16s supply lobe connectors for up to 16 workstations.
Appendix A contains cable descriptions.
You can use RJ45 connectors with either shielded or unshielded
twisted pair cable (STP or UTP). DC connectors are typically used
with IBM Type 1 cable.
The DB-9 connector on the DC model is used only with Andrew’s
intelligent controllers, such as a MAUi product. Switch 4 on the
front panel enables access to this connector on the SL16 DC models.
See Section 2.1 for additional information.
Note that a MAUi only requires RI cables to the MAUs in an
associated stack. Main ring signals loop through the MAUi between
the RI connections to the MAUs, eliminating the need for the RO
cables. In fact, RO cables would disrupt the management capabilities
of the MAUi. The StackLynx Plus controller uses a similar approach.
