4
X
E1/G.703 P
LESIOCHRONOUS
M
ULTIPLEXER
O
PERATING
M
ANUAL
IOA77-1F
14
May 2007
4 I
NSTALLATION AND OPERATION
4.1 Operating
conditions
The devices can operate continuously in closed rooms and in conditions according
to paragraph 7.4.1 of this
Operating Manual
. The devices should not be directly exposed
to sunlight. Ventilation slots must not be plugged. We do not recommend to put the devices on
heat sources, although they can be placed on another device of the same type or installed in
a rack together with other devices. However, such an arrangement requires a free air flow or,
if necessary, forced ventilation.
4.2 Installation
TM-77 is a desktop device; MD-77 is installed in MD-72 telecommunication rack.
MD-77 device comprises a digital card and an interface card. The digital card is installed in
the front part of the rack in slots 1
÷
16 and the interface card is installed in their corresponding
slots in the rear part of the rack. The cards are equipped with pullers for easy assembly
and disassembly in TM-72 rack. The cards can be installed in the rack without a need to turn off
the power supply. There is no specific sequence of assembly of the digital card and interface
card.
The figures below show the rack with the installed MD-77 card (slot 1), MD-77 card (slot 2)
and MD-91 management module card (slot 17) enabling communication with the
Lanwin
management application.
The management module card can be installed in slot 17 only.
Figure 7.
Device installation in form of MD-72 telecommunication rack card, front view.
