The VRM-CI1 is a Passive Terminal Adapter with ISDN basic rate S/T interface. The 3U board achieves a data rate of 128kBit/s uncompressed (both B channels aggregated). The VRM-CI1 complies with international and European ISDN standards as ITU-T 1.430, and is bundled with essential software stack and drivers.
Features:
2x64kbps (56kbps restricted mode for US ISDN lines selectable), protocol D channel transfer rate 16kbps Interface type
Controller chip: Cologne Chip Designs HFC-S PCI A Single-Chip PCI ISDN S/T Transceiver
Independent read and write HDLC channels for two ISDN B channels and one ISDN D channel
Independently selectable B1 and B2 channel transparent mode
FIFO memory window 4x7.5kByte (B channel) and 2x512Byte (D channel), max. 31 HDLC frames (B channel) and 15 HDLC frames (D channel) per channel and direction in FIFO, I²C serial EEPROM interface for configuration data storage
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