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Headset interface
modem or any other single line device
Separate volume control buttons for handset
Up/down volume control
Used with all Samsung DCS telephone systems
Avaya Definity TN577 Packet Gateway (Refurbished) Phones Headset interfaceAvaya Definity TN577 Packet Gateway for r. More Information Provides 4 RS 423 physical ports for X. 25 protocol interfaces between the system and adjuncts Functions as the data communications interface unit providing protocol conversion between the X. 25 protocol and the mode 3 protocol carried across the LAN bus X. 25 protocol (Levels 1 and 2) is terminated and the data reformatted into the ISDN packet mode protocol for transport across the LAN bus
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