The 6424D+M allows you to install a 100A Tip/Ring module, providing a connection between the telephone and such analog adjuncts as modems, fax machines, analog conference-quality speakerphones, answering machines, and TDD machines commonly used by the hearing impaired. The 6424D+M has a built-in 2-way speakerphone and can be wall mounted. A 24-button expansion module can be added to provide 24 additional auxiliary buttons. (The 24-button expansion module requires power from the station or the closet.) The 6424D+M also has a built-in headset jack.
Requirements
The 6400 Series telephones are compatible with the following 2-wire DCP circuit packs:
•TN 2181 (16-port circuit pack)
•TN 2224 (24-port circuit pack)
•TN 2214 (international 24-port circuit pack)
The 7400 Series telephones are 4-wire, multiline, DCP telephones. Although these telephones are supported, they cannot take advantage of the latest set of DEFINITY features. These telephones are not currently sold as new.
