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jolly, 02/19/2016 10:52 PM


PageOutline = 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).

Hardware Information

=== IF-Link between IDU and ODU ===
There are three intermediate frequencies (IFs) that are being used: * Uplink IF at 350 MHz * Downlink IF at 140 MHz * Control IF at low frequency

Mini-Link Equipment that we have

=== RAU ===

==== 7 GHz ====
Qty Type Tx (MHz) Owner
1 RAU1 N 7/11 7426-7484 Jolly
==== 15 GHz ====
Qty Type Tx (MHz) Owner
1 RAU 15/13 14709.25-14823 LaForge (D)
1 RAU 15/16 15024.25-15138 LaForge (D)
==== 18 GHz ====
Qty Type Tx (MHz) Owner
1 RAU1 18/11 17706.5-18009.5 LaForge
1 RAU1 18/15 18716.5-19019.5 LaForge
==== 23 GHz ====
Qty Type Tx Owner
1 RAU 23/56 22002.75-22513.75 Jolly
1 RAU2 L 23/76 22002.75-22288 Jolly
1 RAU2 N 23/76 22002.75-22288 Jolly
1 RAU2 M 23/77 22288-22590.75 LaForge
1 RAU2 M 23/79 23296-23598.75 LaForge
==== 26 GHz ====
Qty Type Tx (MHz) Owner
1 RAU 26/24 24995.25-25445 LaForge
1 RAU 26/29 26003.25-26453 LaForge
==== 38 GHz ====
Qty Type Tx (MHz) Owner
1 RAU 38/12 37338-37619.75 Jolly
1 RAU 38/16 38598-38879.75 Jolly
=== MMU ===
Qty Type Owner
3 MMU 34+2 LaForge
6 MMU 34+2 Jolly
3 MMU 155/16 Jolly
3 MMU 155/128 Jolly
2 MMU 4+2/8 LaForge (D)
=== SMU ===
Qty Type Owner
2 SMU 16x2 LaForge
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