Visara CNA-8000 Installation - Manual (Page 19)

CNA-8000 Installation and Configuration
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Cabling for SDLC Connections
Each QSI (SDLC) card utilizes a “Hydra” cable implementation (a single connector on
one end and with four connectors on the opposite end). The single connector end of the
Hydra cable is attached to the back of the QSI card. Connectors located at the multi-
connector end, will be connected to modem cables or modem eliminator cables. Hydra
cables are approximately 6 ft. in length. Two versions of the QSI card exist. One version
supports RS232, the other V.35. If X.21 modems are to be used, then an appropriate
RS232 to X.21, or V.35 to X.21 converter is required.
The QSI card used in the CNA-8000 is also capable of providing clocks in an
environment where the CNA-8000 is expected to be directly attached to a downstream
SDLC platform without the use of modems or modem eliminators. When this is the case,
a DCE adapter must be attached to each end of the Hydra cable that is to be directly
attached to a downstream platform.
DCE
Adapter
CNA-8000
(Providing Clocks)
AS400
QSI Hydra Cable
(one leg)
Serial Interface
Cable
CNA-8000
Single Hydra
Cable
Modems