Siemens TC12 Installation, Commissioning And Maintenance Handbook page 28

2.2.2.9 IMD Distribution Modules (16i and 16e Units)
The IMD distribution Units (part number 667/7/22609/010), which are part of the
DIGI 16i and DIGI AccelePort 16e units are secured by clamps (667/2/22638/000)
to the IMD Distribution Mounting Panel (667/2/22636/000, see TC12 cabinet
assembly drawing 667/GA/22600/000 and TC12 IMD/Modem Panel assembly
drawing 667/GA/22635/000). This mounting panel is a hinged aluminium panel at
the back of the Instation. Each IMD Distribution Unit has two ribbon cables labelled
P2 and P3. The other end of these ribbon cables connects to the two connectors,
labelled P2 and P3, on the IMD card in the PC.
One IMD module contains 16 25-way D-type connectors. A group of four D-
Connectors connect via a single 24-way cable to one modem PCB, see section
2.2.4.2. This cable provides V.24 signals from the PC to the four modems on one
modem PCB.
The IMD Cables should be secured to the bottom of the hinged IMD panel.
Note: If it becomes necessary to replace either the IMD distribution box or the IMD
PCB they should both be changed at the same time.
Note: Before fitting the card into the PC, the card and the distribution unit should
be laid out on the bench and positions of the folds in the two ribbon
cables, determined. Where the ribbon cables pass through the rear of the
PC they should be strapped together with insulating tape. The card has to
be fitted to the PC before the ribbon cables are finally plugged into the
card.
2.2.2.10 IMD Distribution Modules (Xem Units)
The 16em DB25 Module is the wrong shape to be mounted on the hinged
aluminium panel and is normally mounted on a shelf within the TC12 cabinet. A
suitable shelf is a 1U Modem shelf (RS Part No 228-9441).
2.2.2.11 TC12 Instation PC Software Installation
The TC12 PC Software is supplied on a single floppy disk. There are 2 versions of
TC12 software currently in use, Version 7.4 should be used if it is required to
update an existing installation; Version 8.3 should be used on all new installations.
The installation procedure for both software versions is basically the same, but
version 8.3 has the following additional features:
• Allows a PC processor card with onboard Ethernet to be used
• An option to disable the playing of the start up tune
• An option to disable the driving of the SIP.
• The default screen display shows the state of the TCC Ethernet connection,
and the System and Operational alarm states.
If the TC12 PC does not have a built-in monitor, a VGA monitor should be
attached before starting the software installation process.
666/HE/43100/000
TC12 Installation, Commissioning & Maintenance Handbook
Page 18 Issue 10