Case Communications Mayze 24, Reference Manual, Page: 28 / 166

2.4 Installing the Rackmount Modem
The modem should only be used in a rack system for which it has been
designed and approved. Full installation details are given in the manual
for the rack system.
2.4.1 Power Supply Connection
The rackmount modem draws its power from the rack power supply. There
is no power switch on the modem.
2.4.2 DTE Port Connection
The connections for the modem's DTE port are via the 96-way connectors
between the modem circuit board and the rack system. Connections to the
DTE are made from the back of the rack. See the rack system manual for
details of the pin allocations.
2.4.3 Command Port Connection
The connections for the modem's command port are via the 96-way
connectors between the modem circuit board and the rack system.
Connections to the command terminal are made from the back of the rack.
See the rack system manual for details of the pin allocations.
The format and speed for the command port is fixed at 7 data bits, even
parity, 1200 bps.
2.4.4 Telephone Line Connection
The modem's connections for the telephone line are via the 96-way
connectors between the modem circuit board and the rack system.
Connections to the telephone line are made from the back of the rack. See
the rack system manual for details.
Note that in order to meet the EMC requirements for CE marking the
ferrite core supplied with the card (Cray part number A172-000002) must
be looped twice through the line cord at the rear of the frame corresponding
to the slot into which the rackmount is fitted, and secured with a Tyrap.
The core should be located approximately five inches from the end of the
linecord nearest the frame.
X460-306851 Issue 1 2-8 Rev.1