
Chapter 1: Installation Introduction 3
LEDs
On the rear of the SP manager, two LEDs on each port provide status information about the ports.
Figure 1.3: LEDs for Public and Private Ethernet Ports, AUX and Console Ports (Rear)
Table 1.3: LED Descriptions
Label Label Function Color/Status
A and C (the left LED on
all Ethernet ports)
ACT Monitor Ethernet activity • OFF – Indicates no activity.
• Green – Blinks for any activity.
B and D (the right LED
on all Ethernet ports)
LK/SP Monitor Ethernet link
and speed
• OFF – Indicates either link is not up or
cable is not connected.
• Green – Indicates the speed is 100 or
1000 Megabits/second.
• Yellow – Indicates the speed is 10
Megabits/second.
E LK Monitor RS-232 link • OFF – Indicates either link is not up or
cable is not connected.
• Green – Lights solid when the link is up
and blinks when activity occurs, with
frequency proportional to traffic.
F and H ACT Monitor RS-232 async activity • OFF – Indicates no data activity.
• Green – Blinks when data is either
being received (RX) or
transmitted (TX).
G DTR Monitors console port
for transmissions
• OFF – Indicates the SP manager is not
ready to communicate.
• ON – Indicates the SP manager is
ready to communicate.
MERGEPOINT
TM
5240
A B
CDEF
GH
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