Olson Technology MUSCLE-EM55X - Manual (Page 10)

OTOT-EM55X/XL Optical Transmitter Rev. x1 www.olsontech.com
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are supported: CENELEC frequency plan, all regular 8MHz spacing frequency plans as well as the German 7/8MHz
frequency plan. Additionally it is possible to change the standard software setting to work with regular 6MHz fre-
quency plans (NTSC) or pure 7MHz frequency plans via push-buttons on the front panel or via the NMS interface.
The OTOT-EM55XL is equipped with 4 data interfaces at the rear side:
• RS232 for a local set-up of the NMS Interface,
• RS485 (master) for polling other Olson Technology equipment like EDFA’s or optical switches and translating
this information to the Ethernet interface (HTTP and SNMP),
• Ethernet 10/100Mb/s supporting SNMP and Webserver (HTTP) protocols for interfacing to a EMS or NMS
• Optionally: General purpose I/O interface
The OTOT-EM55X/XL is equipped with two RS485 (slave) interfaces for interfacing to an EMS or NMS. Additionally,
there are two output ports available for simple alarm or warning messaging.
Plug in power supply/fan modules for different input voltages are available for 100 ... 240 V
AC
, and 36 ... 60 V
DC
. Each
module can be simply removed during operation without disturbing the operation of the transmitter by removing two
screws.
The interface configuration for Element Management or Network Management systems is shown in the next two fig-
ures for the OTOT-EM55XL with embedded NEC (network element controller = SNMP Proxy Agent) and the
OTOT-EM55X.
Figure 3 — EMS/NMS Interface
The OTOT-EM55XL-versions (ref. to Figure 3, left) contain an embedded network element controller (NEC), which
works as a SNMP Proxy Agent. All equipment (EDFA’s, optical switches, receivers and power supplies) that are con-
nected to the RS485 master interface and support the RS485 protocol are polled. The received data is then translated
into SNMP and HTTP and can be accessed via the Ethernet interface. The NEC is able to poll up to 48 devices on the
RS485 bus. On the optional I/O ports #1 through 5 warnings/alarms collected from all polled devices can be accessed.
The application software of the NEC can be updated easily in order to support new devices. Olson Technology offers
the MIB-files for easy implementation of the SNMP interface into element/network management systems (EMS/NMS)
such as Cablewatch (Olson Technology), HP Open View or Rosa (SA former Barco Networks).
The OTOT-EM55X (ref. to Figure 3, right) does not contain an embedded NEC. The RS485 slave interface of the
OTOT-EM55X can be accessed directly. An element management system which polls this RS485 interface using the