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As competition for dial tone heightens, service providers must find integrated access devices that allow cost-effective deployment of voice and data services at the customer's premises. ADTRAN answers this call with the Total Access 750 (TA 750) product line. The TA 750, a low-cost integrated access device, allows service providers a means to offer combined voice and data traffic over a single T1 terminating at a customer's premises. The TA 750 supports a broad service offering including analog voice (FXO/FXS), NxData, Fractional T1, ISDN and DDS.The TA 750 provides seven slots for the user to combine a variety of voice and data services based on the specific requirements of each application. Up to six Quad FXS or FXO access modules provide up to 24 analog voice lines. Data options include a Fractional T1 port, as well as DDS, ISDN, and Nx56/64 access modules. The Fractional T1 Drop-and-Insert port on the rear of the unit provides a convenient method of dropping a number of DS0s to a PBX or other equipment via a DSX-1 signal.The design of the TA 750 lends itself to cost-efficient growth or a "grow as you go" architecture. Many applications require only a limited amount of analog circuits and, therefore, do not warrant purchasing or installing 12 or 24 ports as required with other non-modular designs. The benefits of the TA 750 modularity are also found in cost-per-port comparisons and data applications. Because a provider only installs the amount of voice ports needed for the subject application, initial turn-up cost and per-port cost are lower. This is because the provider can defer channel unit cost until it is needed. And in data applications, the TA 750 provides the flexibility to mix voice and data units also based on the particular requirements of each application. When maintenance becomes necessary, the TA 750 design allows technicians to reach the access modules, commons, power supplies, and battery back-up system easily. Access modules are hot swappable and accessible at all times. An individual access module may be replaced without disrupting other units.