CALAMP WIRELESS NETWORKS INC. BDD4T83-2 Manual De Usuario

packet sent and for all subsequent retries.
Some data has possibly been lost. LF is
not functional if all active ports are set to
NAR mode.

Link fails are inevitable during normal
operation (mobiles temporarily out of
range, in a tunnel, parked in a dead spot,
etc.). A lit LF LED is not normally cause
for concern.

Unit Failure - when lit, the unit requires
attention:

 - The BDLC

PD

 is not operable;

It may indicate detection of a system
software error trap.

- The BDLC

PD

 is operable;

Indicates that on power-up, invalid data
was detected in the serial EEPROM chip
(located in the radio modules). It may
also indicate that connection to the radio
modules is incorrect or that radio power
is not applied.

The LM, RM and UF alarms also sound a beep
when a fault occurs. The LF alarm is silent.

Referring to Figure 4, the rear panel of the
BDLC

PD

 has the following set of chassis con-

nectors:

•

 

One DB-25F connector

–  DEV1 - Connects to user’s application.

a)  DMP 19200 or 38400 baud for single-

site installations

b)  MSCP 19200 or 38400 baud for multi-

site installations

•

  Four DE-9F connectors:

–  DEV2 - usually connected to Dataradio’s

WinRIS program  (Dedicated or DMP at
19200 baud).

–  DEV3 - Dedicated (up-to 9600 baud)

–  DEV4 and DEV5 - not used

•

 

One DA-15M connector:

–  DEV6 Digital I/O - not used

•

 

One DB-25M connector:

–  EXT RADIO/TEST - connects to the Ra-

dio assembly through the radio interface
cable (see Figure 15)

In the description of data signals in Table 7, the
following conventions are used:

ON

Asserted, spacing

+3 to +15 V

OFF

Dropped, marking

-3 to -15 V

1

DCD – from Paragon

PD

, normally asserted

2

RXD – data from Paragon

PD

3

TXD – data to Paragon

PD

4

DTR – to Paragon

PD

, handshaking

5

Ground

6

DSR – from Paragon

PD

, tied to VCC through

current limiting resistor

7

RTS - to Paragon

PD

, handshaking

8

CTS – from Paragon

PD

, handshaking

9

Reserved

1 and 7

Ground

2

TXD – data to BDLC

PD

3

RXD – data from BDLC

PD

4

RTS – to BDLC

PD

, must be asserted

5

CTS – from BDLC

PD

, handshaking

6

DSR – from BDLC

PD

, always +8V

8

DCD – from BDLC

PD

, always asserted

9

RI      - from BDLC

PD

, always –8V

20

DTR – to BDLC

PD

, handshaking

We recommend the use of shielded 9-wire or
25-wire cables with all pins connected.

Dataradio recommends the use of secure (i.e.
password protected and/or dial-back) modems in
any installation where dialup access is provided.