Connect Tech Blue Heat/Net Sync User Manual
14 Revision 0.03
Loopback Connectors
Loopback connectors are useful for performing diagnostics. The following figure illustrates the
recommended pinouts for creating loopback connectors for Blue Heat/Net Sync.
Figure 7: Recommended Pinouts for V.28 (RS-232) Loopback Connector
Figure 8: Recommended Pinouts for a V.11 (RS422) Loopback Connector
NOTES:
1. For an as ynchronous loopback, omit the TXC and RXC pin.
2. W hen using clock signals, one signal must be configured as an
input, while the other must be configured as an output.
3. W hen using a DB-25 female loopback connector, solder cup
DB-25 connectors and 24 AWG solid core wire, such as wire
from a CAT5 cable is recommended.
2 - TX-
14 - TX+
16 - RX+
3 - RX-
9 - RXC+
17 - RXC-
11 - TXC+
12 - TXC-
7 - SR
DB-25 Male
2 - TX
3 - RX
4 - RTS
5 - CTS
6 -DSR
8 - DCD
20 - DTR
22 - RI
15 - TXC
17 - RXC
DB-25 Male