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5.0 CONFIGURATION
All configuration is done through software auto-detection for the
Model 2135. Once you have configured your mux or other equipment
to be connected to the 2135, the unit is ready for operation. Observe
that the serial port of the 2135 is configured as a DTE and must con-
nect to a DCE.
The LAN port also requires no configuration to connect to a
10BaseT Ethernet.
Note: The V.35 Interface is configured as a DTE. The 2135 will transmit
and receive data to and from the DCE, based on the speed of the
clocks received from the DCE.
On the LAN side interface, data is sent and received in burst mode at
10Mbps.
5.1 LED STATUS MONITORS
The 2135 uses two LEDs on the Ethernet connection side. A green
LED indicates that link connection to the network is established. The
yellow LED displays status codes (See section 5.1.2 for status code
information).
Seven, low power, LEDs located on the top of the 2135 case indi-
cate POWER and V.35 signal activity.
5.1.1 LAN side LEDs
The Model 2135 features two LAN LEDs that monitor general
operation status and the 10BaseT twisted pair link integrity. Figure 4
shows the LEDs located at the rear of the Model 2135. Following
Figure 4 is a description of each LED function. Figure 5 shows the
LEDs located on the top of the Model 2135.
9
RJ-45 Jack, 10BaseT connection
Power
Jack
Figure 4. 2135 rear view
5.1.2 LED Descriptions
The status LED blinks yellow from one to eleven times to indicate
system status. Each pulse pattern is separated by a 2 second "off " peri-
od. Greater pulse patterns have higher priority (buffer saturation has
greater priority than an empty MAC table).
Valid system statuses are:
1 pulse
= system status ok
2 pulses
= No MAC entries in the MAC address table
3 pulses
= Clear to send (CTS) or Carrier Detect (DCD) from
base unit are not asserted
4 pulses
= IMRC2/IA buffer is saturated
5 pulses
= WAN receive frame(s) too large
6 pulses
= WAN receive frame(s) not Octet aligned
7 pulses
= WAN receive frame(s) aborted
8 pulses
= Detected WAN receive frame(s) with bad CRC
9 pulses
= Detected LAN receive frame(s) too large
10 pulses
= Detected LAN receive frame(s) not Octet aligned
11 pulses
= Detected LAN receive frame(s) with bad CRC
After a status code is displayed eight times and the associated con-
dition is removed, the status code will no longer appear.
The link LED glows green to indicate link integrity on the 10BaseT
twisted pair line.
5.1.3 Power and DCE/DTE Interface LEDs
Seven LEDs indicate POWER and DTE/DCE activity on the front of
the 2135.
Yellow LED,
Status
Green LED,
link integrity
10
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