Table of Contents
Advertisement
5.0 CONFIGURATION
All configuration is done through software auto-detection for
the Model 2121/2135C. Once you have configured your mux or
other equipment to be connected to the 2121/2135C, the unit is
ready for operation. Observe that the serial port of the
2121/2135C is configured as a DTE and must connect to a DCE.
The LAN port also requires no configuration to connect to a
10BaseT Ethernet.
Note: The X.21 and V.35 Interface is configured as a DTE. The
2121/2135C 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 2121/2135C 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
2121/2135C case indicate POWER and X.21 or V.35 signal activ-
ity.
5.1.1 LAN side LEDs
The Model 2121/2135C features two LAN LEDs that monitor
general operation status and the 10BaseT twisted pair link
integrity. Figure 8 shows the LEDs located at the rear of the
Model 2121/2135C. Following Figure 8 is a description of each
LED function. Figure 8 shows the LEDs located on the top of the
Model 2121/2135C.
RJ-45 Jack, 10BaseT connection
POWER
JACK
Figure 8. 2121/2135C rear view
Yellow LED, Status
Green LED, link integrity
11
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 " period. 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 associ-
ated condition 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 2121/2135C.
12
Advertisement
Table of Contents
