Multi-Tech Systems MT2456SMI22 manual Regulatory Design Considerations, Hardware Considerations

Appendix B – Product Approvals, Regulatory Design Considerations, Compliance

Regulatory Design Considerations

This section discusses hardware considerations, safety, and Telecom labeling requirements.

Hardware Considerations

Disclaimer: Multi-Tech Systems makes no warranty claims for vendor product recommendations listed below. Other vendor products may or may not operate satisfactorily. Multi-Tech System’s recommended vendor products only indicate that the product has been tested in controlled conditions and were found to perform satisfactorily.

Figure B–1. Recommended Main Board Filtering

Surface mount ferrites are used on T&R (Tip and Ring) to mitigate emission levels out the RJ-11 cable. 220pF capacitors are also used on T&R to reduce the common mode emissions that may be present in certain systems. The ferrite and capacitors also aid in reducing the effects of transients that may be present on the line.

Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide 49