3Com 3C10111C - NBX 100 - Modular Exp Base Installation Manual page 28

28 C 1: I
HAPTER NTRODUCTION
If S1 and S2 are both on, the operating system software has not
■
started successfully.
If S1 and S2 flash in an alternating pattern, a file system check is in
■
progress, possibly due to an improper shutdown, and the boot
process will take longer than normal.
S3 — Indicates the status of music on hold (MOH).
If S3 is flashing (approximately 2 flashes per second), the music on
■
hold processor is initializing. If this flashing continues for more
than 2 minutes, the processor has not started successfully.
If S3 is on, the MOH processor has started successfully.
■
If S3 is flashing slowly (approximately 1 second on and 1 second
■
off), the MOH processor has started successfully, but no music
source is connected.
VOL-MOH — This mini-jack (mono or stereo) accepts Music-On-Hold
■
audio from a CD player, tape player, or other music source. The
adjusting screw next to the jack controls the volume.
PAGING — This RJ-11 connector provides an audio output or a dry
■
contact switch connection for use with a public address system.
EXT ALERT — This RJ-11 connector is reserved for future use.
■
10BT UPLINK — This connector provides means to connect to an
■
external Ethernet switch or hub.
The 3C10110C Network Call Processor includes a BNC connector for
uplink connections. The BNC and RJ-45 uplink connectors are alternative
connections for a single port. They cannot be used simultaneously.
If you use the Uplink connector, be sure to program the switch or router
on the other end for 10BASE-T 10 MB operation.
COM1 — The COM1 connector provides a DTE (Data Terminal
■
Exchange) connection for use with a VT100-compatible control
terminal. This connection provides command line access to the Call
Processor's operating system and diagnostic commands.
COM2 — Reserved for future use.
■