Ericsson Minilink » History » Version 5
admin, 02/19/2016 10:52 PM
add links to pics
1 | 2 | admin | [[PageOutline]] |
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2 | 1 | admin | = Ericsson Mini-Link = |
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4 | Ericsson Mini-Link is a series of commercially very successful microwave links. |
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6 | They are used world-wide for back-hauling GSM BTS and UMTS Node-B, i.e. for the |
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7 | A-bis and IuB-links. |
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8 | |||
9 | Every microwave link is a point-to-point link. |
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10 | |||
11 | Each side of the link has an IDU (In Door Unit) and ODU (Out Door Unit). |
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12 | |||
13 | 5 | admin | === IDU (MMU) === |
14 | 1 | admin | The IDU is responsible for transmitting and receiving at the respective microwave frequency (normally 7...38GHz). |
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16 | In the Mini-Link system they are most commonly they are called MMU. |
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18 | There are different types of MMUs, representing the different link speeds of the microwave link, e.g. |
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19 | * MMU 34+2 (1 E3 link at 34 Mbps plus 1 E1 link for mgmt) |
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20 | * MMU 4x2 (4 E1 links at each 2 Mbps) |
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21 | |||
22 | The MMU has connections for the data links (E1, E3, STM-1, etc.) as well as a coaxial wire connecting it with the |
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23 | ODU. |
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25 | 5 | admin | You can see photographs of the interior of a MMU in the following album: http://laforge.gnumonks.org/photoalbum/devices/ericsson_minilink/mmu_34_2/index.html |
26 | |||
27 | === SMU === |
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28 | |||
29 | The SMU is a unit that aggregates SDH links, e.g. the SAU 16x2 aggregates 16 E1 links into one E3 |
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31 | http://laforge.gnumonks.org/photoalbum/devices/ericsson_minilink/smu_16_2/index.html |
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32 | === SAU === |
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34 | The SAU can control various site-local digital input and outputs throug the management link. |
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36 | http://laforge.gnumonks.org/photoalbum/devices/ericsson_minilink/sau_exp1/index.html |
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37 | |||
38 | === ODU (RAU) === |
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39 | 1 | admin | The ODU is contains the actual modem that modulates the E1, E3 or STM-1 link onto the IF (Intermediate Frequency) |
40 | which is put on the coaxial link towards the ODU. |
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41 | |||
42 | Conversely, on a different IF, there is the down-link from the ODU towards the demodulator/decoder in the IDU. |
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43 | |||
44 | In the Mini-Link system, the ODU is commonly called RAU (Radio Access Unit). |
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45 | |||
46 | 2 | admin | == Hardware Information == |
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48 | === IF-Link between IDU and ODU === |
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49 | There are three intermediate frequencies (IFs) that are being used: |
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50 | * Uplink IF at 350 MHz |
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51 | * Downlink IF at 140 MHz |
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52 | * Control IF at low frequency |
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53 | |||
54 | 1 | admin | == Mini-Link Equipment that we have == |
55 | |||
56 | === RAU === |
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57 | |||
58 | 3 | jolly | ==== 7 GHz ==== |
59 | ||Qty||Type||Tx (MHz)||Owner|| |
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60 | 4 | jolly | ||1||RAU1 N 7/11||7426-7484||Jolly|| |
61 | 3 | jolly | |
62 | 1 | admin | ==== 15 GHz ==== |
63 | 2 | admin | ||Qty||Type||Tx (MHz)||Owner|| |
64 | ||1||RAU 15/13||14709.25-14823||LaForge (D)|| |
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65 | ||1||RAU 15/16||15024.25-15138||LaForge (D)|| |
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66 | 1 | admin | |
67 | 2 | admin | ==== 18 GHz ==== |
68 | ||Qty||Type||Tx (MHz)||Owner|| |
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69 | ||1||RAU1 18/11||17706.5-18009.5||LaForge|| |
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70 | ||1||RAU1 18/15||18716.5-19019.5||LaForge|| |
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71 | 1 | admin | |
72 | ==== 23 GHz ==== |
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73 | 2 | admin | ||Qty||Type||Tx||Owner|| |
74 | 4 | jolly | ||1||RAU 23/56||22002.75-22513.75||Jolly|| |
75 | ||1||RAU2 L 23/76||22002.75-22288||Jolly|| |
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76 | ||1||RAU2 N 23/76||22002.75-22288||Jolly|| |
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77 | 2 | admin | ||1||RAU2 M 23/77||22288-22590.75||LaForge|| |
78 | ||1||RAU2 M 23/79||23296-23598.75||LaForge|| |
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79 | 1 | admin | |
80 | 3 | jolly | |
81 | 2 | admin | ==== 26 GHz ==== |
82 | ||Qty||Type||Tx (MHz)||Owner|| |
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83 | ||1||RAU 26/24||24995.25-25445||LaForge|| |
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84 | ||1||RAU 26/29||26003.25-26453||LaForge|| |
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85 | |||
86 | 3 | jolly | ==== 38 GHz ==== |
87 | ||Qty||Type||Tx (MHz)||Owner|| |
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88 | 4 | jolly | ||1||RAU 38/12||37338-37619.75||Jolly|| |
89 | ||1||RAU 38/16||38598-38879.75||Jolly|| |
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90 | 3 | jolly | |
91 | 1 | admin | === MMU === |
92 | 2 | admin | ||Qty||Type||Owner|| |
93 | 1 | admin | ||3||MMU 34+2||LaForge|| |
94 | 3 | jolly | ||6||MMU 34+2||Jolly|| |
95 | ||3||MMU 155/16||Jolly|| |
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96 | ||3||MMU 155/128||Jolly|| |
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97 | 2 | admin | ||2||MMU 4+2/8||LaForge (D)|| |
98 | 1 | admin | |
99 | === SMU === |
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100 | 2 | admin | ||Qty||Type||Owner|| |
101 | 1 | admin | ||2||SMU 16x2||LaForge|| |