The Lucent TN646F / Avaya TN464F Universal DS1 / ISDN Circuit Card supports DS1 Rate (24 Digital Channels) and
E1 Rate (32 Digital Channels).
Supports CO, TIE, DID and Off Premises Stations (OPS) ports using the Robbed Signal Protocol, prorietary
bit-oriented signaling, BOS 24th Channel Signaling Protocol and the DMI-BOS 24th Channel Signaling Protocol.
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