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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
=== RAU ===
==== 7 GHz ====Qty | Type | Tx (MHz) | Owner | |||||
1 | RAU1 N 7/11 | Jolly |
Qty | Type | Tx (MHz) | Owner | |||||
1 | RAU 15/13 | 14709.25-14823 | LaForge (D) | |||||
1 | RAU 15/16 | 15024.25-15138 | LaForge (D) |
Qty | Type | Tx (MHz) | Owner | |||||
1 | RAU1 18/11 | 17706.5-18009.5 | LaForge | |||||
1 | RAU1 18/15 | 18716.5-19019.5 | LaForge |
Qty | Type | Tx | Owner | |||||
1 | RAU 23/56 | Jolly | ||||||
1 | RAU2 L 23/76 | Jolly | ||||||
1 | RAU2 N 23/76 | Jolly | ||||||
1 | RAU2 M 23/77 | 22288-22590.75 | LaForge | |||||
1 | RAU2 M 23/79 | 23296-23598.75 | LaForge |
Qty | Type | Tx (MHz) | Owner | |||||
1 | RAU 26/24 | 24995.25-25445 | LaForge | |||||
1 | RAU 26/29 | 26003.25-26453 | LaForge |
Qty | Type | Tx (MHz) | Owner | |||||
1 | RAU 38/12 | Jolly | ||||||
1 | RAU 38/16 | Jolly |
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) |
Qty | Type | Owner | ||||
2 | SMU 16x2 | LaForge |
Updated by jolly over 8 years ago · 3 revisions