Installation and Maintenance Manual Nimbra 300 Series
Product Overview
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©2006 Net Insight AB, All rights reserved
2 x OC-12/STM-4 Trunk Module
The 2 x OC-12/STM-4 Trunk Module has two Small Form-factor Pluggable
(SFP) port that can be fitted with opto-modules for different distances and
physical media. Intermediate Range (IR1), and Long Range (LR1/LR2) modules
are available. See separate description.
Each module maps 1152 64-bit slots into each SONET STS-12c SPE/SDH VC-
4-4c according to the ETSI ES 201 803-4 specification. Each port runs at 512
kbps resulting in a total port payload of 589.824 Mbps. Out of this capacity
typically one slot is used for internal signaling and 0 - X slots for management
purposes, where X depends on the configuration of the in-band management
network. This means that up to 589.312 Mbps can be used for user payload per
port, resulting in an overhead less than 2%.
The front panel of the module is shown below.
Figure 7. Front panel 2 x OC-12/STM-4 Trunk Module
In normal operation the Power LED is lit and the Remove indicator LED is off.
A Request removal button is used when the Module should be replaced (see
chapter Hardware Maintenance). Status indicator LEDs provide information
about the status of the respective ports. Refer to chapter Specifications for
information about these indicators.
To insert, disconnect or replace a trunk module, refer to chapter Hardware
Maintenance.
SFP Transceiver for 2 x OC-12/STM-4 Module: The transceiver modules for the
2 x OC-12/STM-4 Module are removable and can be changed depending on the
distance to the other units in the network. See separate description.
