when used with a newbridge external power supply (part number 90-0316-xx), the 2601, 2602 and 2603 mainstreet dtus meet class b emc requirements. additional class b emc requirements are as follows:

    2601, 2602 and 2603 mainstreet dtus

    install a small ferrite block to the line cable as close to the line connector as possible. see section 2.2.

    shielded device port cables should be used with the 2601, 2602 and 2603 mainstreet dtus.

    2602 mainstreet dtu

    install a large ferrite block around each device port cable as close to the x.21 or v.35 connectors as possible. see installation section 2.2.