DM16E1 / DM4E1 Operation and Installation Manual - 204-4001-19 96
15. INSTALLATION
The equipment may be either installed directly on a 19” rack, mounted on the wall, or standing on a table
or cabinet. Installation and maintenance are quick and easy due to its compact design and rear panel
connections.
Before installation, it is advisable to perform a brief analysis regarding the following aspects.
• Topology and backup. Analyze the topology on which the equipment will be installed. Each
topology has its own installation pattern. Also, backups may be utilized or not — for example,
point to point with 1+1 backup. It is possible to directly manage remote devices (in band
management) depending on the topology. Each architecture will be detailed below.
• Interfaces. Analyze which and how many interfaces will be used and whether the equipment
makes it available. For example, one DM4E1 with aggregate in E3 is enough for four G.703 to 2M
interfaces, a router and a Fast Ethernet bridge interface. Additional cards are needed for Fast
Ethernet and optic modems. Also, when V.35 operates together with Fast Ethernet it should be
possible to ignore the control signals CT106, CT107 and CT109 which are generated from this
interface. Please refer to the following chapters for additional information.
• Connections. Analyze which connections will be used in each interface and check if adequate
connectors are present. Monofiber and two-fiber optic interfaces use the same connectors if one
monofiber is 1550 nm and the other is 1310 nm. For example, optic interfaces will be SC/PC
monofiber, G.703 will be IEC and Ethernet will be RJ45.
• Power supply. This is the easiest item. Since power supplies can operate with both AC and DC
power with automatic selection and hot swapping, it is enough to define if the equipment will
operate with a redundant power supply or not.
• Management. Analyze if management will be local with remote configuration of other devices (in
band). Define which devices will be managed directly via SNMP and which ones will be managed
remotely. Access points, Ethernet or Frame Relay/PPP (in band) must be available for directly
managed devices. Please note that some topologies do not allow in band management and some
SNMP parameters can only be configured via terminal.
Once these items are analyzed and defined, the equipment may be installed straightforwardly. Please refer
to the next chapters for detailed step-by-step information.
15.1. Wall and 19” Rack Mounting
Installing equipment on a 19” rack is as easy as fastening the left and right brackets. The rubber feet may
be removed if desired. It is advisable to allow at least 0,5 U spacing between devices. Connections for
aggregates, tributaries and management are available on the rear panel. The front panel contains the
status indicator leds, the terminal management connector and the service channel connector (connected to
a regular telephone set).
For wall mounting, the position of both brackets should be changed so that they face downwards. With the
brackets positioned as such, wall mounting is simple. The rubber feet may be removed, but be careful not
to scratch the finish when mounting the device. The panel with connections for aggregates, tributaries and
management must be facing down. The panel facing up contains the status indicator leds, the terminal
management connector and the service channel connector (connected to a regular telephone set).
15.2. Optical Connections
This equipment uses non-visible laser radiation emitters. Never look direct
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