CalAmp INTEGRA-TR User Manual page 16

Figure 9 - DCE Crossover Cable for RTS-CTS Mode
Some point-to-point FDX landline modems or line drivers may require the use of DOX mode and an alternate pinout for
DTR, DCD, CTS and RTS as shown in Figure 10.
Figure 10 - DCE Crossover Cable for DOX Mode
Integra-TR User Manual Page | 16