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admin, 02/19/2016 10:52 PM
add page about mini-link


= Ericsson Mini-Link =

Ericsson Mini-Link is a series of commercially very successful microwave links.

They are used world-wide for back-hauling GSM BTS and UMTS Node-B, i.e. for the
A-bis and IuB-links.

Every microwave link is a point-to-point link.

Each side of the link has an IDU (In Door Unit) and ODU (Out Door Unit).

=== IDU ===
The IDU is responsible for transmitting and receiving at the respective microwave frequency (normally 7...38GHz).

In the Mini-Link system they are most commonly they are called MMU.

There are different types of MMUs, representing the different link speeds of the microwave link, e.g. * MMU 34+2 (1 E3 link at 34 Mbps plus 1 E1 link for mgmt) * MMU 4x2 (4 E1 links at each 2 Mbps)

The MMU has connections for the data links (E1, E3, STM-1, etc.) as well as a coaxial wire connecting it with the
ODU.

=== ODU ===
The ODU is contains the actual modem that modulates the E1, E3 or STM-1 link onto the IF (Intermediate Frequency)
which is put on the coaxial link towards the ODU.

Conversely, on a different IF, there is the down-link from the ODU towards the demodulator/decoder in the IDU.

In the Mini-Link system, the ODU is commonly called RAU (Radio Access Unit).

Mini-Link Equipment that we have

=== RAU ===

==== 15 GHz ====
1 RAU 15/13 LaForge
1 RAU 15/16 LaForge
==== 26 GHz ====
1 RAU 26/24 LaForge
1 RAU 26/29 LaForge
==== 23 GHz ====
1 RAU2 M 23/77 LaForge
1 RAU2 M 23/79 LaForge
=== MMU ===
3 MMU 34+2 LaForge
=== SMU ===
2 SMU 16x2 LaForge
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