HP 304398-031 - Modem cable kit - Includes 6-pin RJ-11 (M) to 6-pin RJ-11 (M) 2.1m (7.0ft) long cable with ferrite cylinder, and a RJ-11 (F) to BT6

Modem cable kit - Includes 6-pin RJ-11 (M) to 6-pin RJ-11 (M) 2.1m (7.0ft) long cable with ferrite cylinder, and a RJ-11 (F) to BT631A (M) adapter plug (Black plastic) - For converting a standard 6-pin RJ-11 phone/modem cable (for use in the U.K.)