Avaya Definity TN556D ISDN-BRI 4-Wire S/T-NT 12-Port Interface (Refurbished) Southwestern Bell volume control

volume control

The Norstar Applications Module (NAM) can be expanded to 32 channels to provide support for other applications like ACD and IVR

There is no documentation provided with this refurbished product

0 or higher Advanced Hybrid System only

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Avaya Definity TN556D ISDN-BRI 4-Wire S/T-NT 12-Port Interface (Refurbished) Southwestern Bell volume controlAvaya 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