Polycom DOC2238A - Manual (Page 160)

Appendix A: Interfaces Pin Assignment
A-6
Cables For the MPI-4/8 Network Interface Module
There are three new cables for interfacing with the MPI-4/8 Network
Interface Module in DCE. The difference in the cables is that they have
certain pins that are crossed.
1. Part Number: CON2044A – Adapter RS-449 (BD37) to V.35 (female)
crossed DCE.
2. Part Number: CON 2045A- Adapter RS-449/EIA530 Crossed DCE
(DB37M/DB37F).
3. Part Number: CON2046A- Adapter RS-449/RS-449 Crossed DCE
(DB37M/DB37F).