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Contents
Installation and Maintenance Manual Nimbra 300 Series
©2006 Net Insight AB, All rights reserved
OC-48/STM-16 X-ADM Trunk Module
The OC-48/STM-16 X-ADM Module is a is a 2-port trunk module with on-
board non-blocking switch matrix. It features two OC-48/STM-16 trunk ports
that can be fitted with Small Form-factor Pluggable (SFP) modules.
The module maps 4608 64-bit slots into each SONET STS-48c SPE/SDH VC-4-
16c according to the ETSI ES 201 803-4 specification. Each slot carries 512
kbps payload resulting in a total payload of 2359.296 Mbps. Out of this capacity
one slot is always 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 2358.784 Mbps can be used for user payload,
resulting in an overhead less than 2%.
The backplane interface can handle mapping of 4752 payload slots from and to
the module.
The front panel of the module is shown below.
Figure 4. Front panel OC-48/STM-16 X-ADM
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.
Possible transceivers are described in a separate chapter.
