Sierra Wireless DART 200 CDPD Modem manual Dart 200 Cdpd Modem User’s Guide Device Attachment

DART 200 CDPD Modem User’s Guide 6 Device Attachment

To identify this problem connect a PC directly to the device and establish communication. If communication is established, the device uses a DCE interface and requires a null modem to communicate with the DART 200.

Null modem adapters are available as stand-alones; that look like an RS-232 gender-changer, or as null modem cables. Null modem adapters are available from electronics stores and are well suited for application development. Null modem cables can be ordered from cable suppliers, and are better suited for field deployment, because the cables eliminate the extra part and failure prone connections required for a stand-alone null modem.

PN1197-00 Revision 1.0 6-3