3Com NBX 100 Installation Manual page 32

32 C 1: I
HAPTER NTRODUCTION
Table 10 NBX 100 NCP Connectors and LEDs
1 Status LEDs
2 VOL
3 MOH
4 Paging
5 Ext. Alert
6 10BT Uplink
and LINK LED
7 COM1
8 COM2
S1 and S2 — Indicate operating system status.
S1 and S2 both flashing (approximately 2 flashes per
second). The hardware is initializing.
S1 on and S2 off. The operating system has started
successfully.
S1 and S2 are both on. The operating system software has
not started successfully.
S1 and S2 flash in an alternating pattern. A file system
check is in progress, possibly due to an improper
shutdown. The boot process will take longer than normal.
S3 — Indicates the status of Music-On-Hold (MOH).
S3 flashing (approximately 2 flashes per second). The MOH
processor is initializing. If this flashing continues for more
than 2 minutes, the processor has not started successfully.
S3 solid on. The MOH processor has started successfully.
S3 flashing slowly (approximately 1 second on and 1
second off). The MOH processor has started successfully,
but no music source is connected.
This adjusting screw controls the volume of Music-On-Hold.
Mini-jack (mono or stereo) that accepts Music-On-Hold audio
(maximum 2V peak to peak) from the line output of a CD
player, tape player, or other music source.
This RJ-11 connector provides an audio output or a dry
contact switch connection for use with a public address
system.
Reserved for future use.
RJ-45 connector provides means to connect to an external
Ethernet switch or hub. Be sure to program the switch or
router on the other end for 10 MB operation.
DB-9 connector that provides an RS-232 (DCE) TTY terminal
connection for access to system CLI commands and status
messages. For information on how to connect to the NCP
using the Console connector, see
a Console Port" on page
Reserved for future use.
"Connecting a Computer to
196.