Honeywell Q7055A - Manual (Page 52)

BUILDING NETWORK ADAPTER BNA-1C/2CS/2DN
52 EN1B-0198GE51 R0801
TCP Transmission Control Protocol
WAN Wide Area Network
XD505 C-Bus piggyback type of XL500
controllers.
Compatible with EXCEL IRC devices
on the same bus.
XD508 C-Bus piggyback type of XL500
controllers. This piggyback type allows
C-Bus communication transfer rates up
to 76.8
kbps. This piggyback type
allows C-Bus wiring with XL500
controllers only.
XLCL EXCEL Classic