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0 or higher Advanced Hybrid System only
volume control
It also reduces the total cost of ownership for this configuration
three important factors that come together in one unparalleled voice messaging system-Comdial's Debut
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Avaya Definity TN556D ISDN-BRI 4-Wire S/T-NT 12-Port Interface (Refurbished) Southwestern Bell 0 or higher Advanced HybridAvaya Definity TN556D ISDN BRI 4 Wire S T NT Interface (12 Ports). More Information Provides 12 Ports connecting to ISDN BRI terminals Each port has TXT, TXR, PXT, and PXR signal leads Up to 8 ports can be used for adjunct switch application interface (ASAI) links Each port operates at 192 kbps per second and has 2 B channels and 1 D channel Requires a packet control circuit pack (TN778) when used in R6si systems or packet bus equipped R6vs systems
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