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              Place 
                and receive callsTap 
                DEFINITY ECS features like Hold, Drop, Transfer and Conference 
                Covers 
                multiple calls Supports 
                Voice Mail Message Waiting notification Advanced 
                V.34 modem and G.723 voice compression Data 
                performance up to 56Kbps and up to 256Kbps with compression Supports 
                call-on-demand (COD) and dial-back An 
                integrated ISDN terminal adapter Enhanced 
                voice using 32Kbps ADPCM voice compression Requires 
                2 Bearer ("B") Channels of an ISDN Basic Rate Interface 
                (BRI) line, B1 for voice, B2 for data 
 
 
 
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