| Neil's reply prompted me to update this note.
The "plug-in" sync options on systems currently manufactured are:
PBXDP-Ax PCI sync card: 2, 4 and 8 port variants;
V.24 (RS-232), V.35, X.21 and EIA-530 supported
All ports at over 2Mbps.
PBXDI-Ax ISA sync card, 2 and 4 port variants;
V.24 (RS-232), V.35, X.21 and EIA-530 supported
All ports at over 2Mbps.
DNSES EISA sync card, 2 ports only
V.24 (RS-232), V.35 and X.21 supported
2 ports at 64kbps or 1 port at 2Mbps.
The software for PBXDx cards supports HDLC framing only (protocols
LAPB, DEC HDLC, X.25). There is software for the DNSES and DCS-90
to support a variety of other protocols (e.g. DDCMP, Bisync, SS7
- consult the individual product's documentation for the specifics)
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