Ericsson Minilink » History » Revision 7

Revision 6 (admin, 02/19/2016 10:52 PM) → Revision 7/9 (admin, 02/19/2016 10:52 PM)


 '''NOTE: All information here is collected by us, we have no contact or affiliation with Ericsson.    We have no idea how accurate our information-gathering has been.''' 

 = 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 (MMU) === 
 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 

 You can see photographs of the interior of a MMU in the following album: 

 === SMU === 

 The SMU is a unit that aggregates SDH links, e.g. the SAU 16x2 aggregates 16 E1 links into one E3 
 === SAU === 

 The SAU can control various site-local digital input and outputs throug the management link. 

 === ODU (RAU) === 
 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 ==== 
 ||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 === 
 ||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 === 
 ||2||SMU 16x2||LaForge|| 

 === SAU === 
 ||1||SAU 1 Exp||LaForge||
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