ADTRAN ISU 128 user manual FCC ID HDC1202029TL

FEDERAL COMMUNICATIONS COMMISSION

RADIO FREQUENCY INTERFERENCE STATEMENT

FCC ID: HDC1202029TL

This equipment has been tested and found to comply with the limits for a Class B dig- ital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio or TV reception, which can be determined by turning the equipment off and on. The user is encouraged to try to correct the interference by one or more of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

•Consult the dealer or an experienced radio/TV technician for help.

This device is FCC Class B certified only on the EIA-232 interface. The V.35 and RS-530 interfaces are FCC Class B verified.

Changes or modifications not expressly approved by ADTRAN will void the user’s authority to operate this equipment.