Connect Tech Blue Heat/Net User’s Manual
20 Revision 0.13
Connecting to DCE type devices:
DCE type devices do not require a null modem cable; instead, they require a straight through
cable. Straight through cables, both DB-9 to DB-9 and DB-9 to DB-25, are commonly available.
The following is an example of a DB-9 female cable to a DB-25 male cable to connect to a
modem.
Figure 4: DB-9 female to DB-25 male for modem connection.
Loopback Connectors:
Loopback connectors are useful for performing diagnostics. The following are the recommended
pinouts for creating loopback connectors for your Blue Heat/Net products.
Figure 4: Recommended pinouts for loopback connectors.
DB-9:
For DB-9 female loopback connectors we recommend solder cup DB-9 connectors and
28 AWG solid core wire.
RJ-45:
For RJ-45 loopback connectors, we recommend 8 pin RJ-45 connectors and about 2
inches of CAT 5 cable. You will have to crimp the wires from the CAT 5 cable into the RJ-45
plug, then strip and solder the wires to match the above loopback pinout.
