DUG 20 » History » Version 9
laforge, 08/09/2020 02:32 PM
| 1 | 1 | laforge | h1. DUG 20 |
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| 2 | |||
| 3 | 2 | laforge | This is the second-generation GSM Digital Unit for RBS 6xxx. It combines the baseband processing and back-haul interface of up to 12 TRX, in 1..6 logical BTSs. |
| 4 | 1 | laforge | |
| 5 | 2 | laforge | The DUG 20 is only compatible with the [[RUS]] and [[RRUS]] radio units, not with the older [[RUG]] units. |
| 6 | |||
| 7 | 3 | roh | {{thumbnail(DUG20_01_front_complete.jpg, size=900)}} |
| 8 | |||
| 9 | 4 | roh | {{>toc}} |
| 10 | |||
| 11 | 2 | laforge | h2. Technical data |
| 12 | |||
| 13 | * 48V DC supply power |
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| 14 | * 70W maximal power consumption |
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| 15 | * Size: 8U x 31mm x 250mm |
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| 16 | * Weight: < 2kg |
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| 17 | |||
| 18 | 7 | laforge | h2. Flash |
| 19 | 2 | laforge | |
| 20 | 7 | laforge | There is a CF slot on the left this device and it holds a 256mbyte CF card. The card contains a FAT filesystem with both the software as well as the configuration (IDB = Installatin DataBase). |
| 21 | 1 | laforge | |
| 22 | 7 | laforge | {{thumbnail(DUG20_01_CF-slot_detail.jpg, size=400)}} |
| 23 | 1 | laforge | |
| 24 | 7 | laforge | h2. Connections |
| 25 | 2 | laforge | |
| 26 | 7 | laforge | h3. Front Haul |
| 27 | 2 | laforge | |
| 28 | 7 | laforge | The DUG 20 has 6 SFP slots for the interface towards the radio units, labelled RI A..F |
| 29 | 3 | roh | |
| 30 | 7 | laforge | {{thumbnail(DUG20_01_SFP_1_detail.jpg, size=400)}} |
| 31 | {{thumbnail(DUG20_01_SFP_2_detail.jpg, size=400)}} |
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| 32 | 3 | roh | |
| 33 | 7 | laforge | This is where you connect your [[RUS]] or [[RRUS]], either via direct-attach cables (usual for RUS), or via SFP transceivers and optical fiber (usual for RRUS). |
| 34 | 3 | roh | |
| 35 | 7 | laforge | h3. Back-Haul interface |
| 36 | 3 | roh | |
| 37 | 7 | laforge | The back-haul interface is Classic T1/E1/J1 (ISDN) based. The DUG has four T1/E1/J1 lines exposed as two RJ45 connectors ("ET A" and "ET B") |
| 38 | 3 | roh | |
| 39 | 7 | laforge | {{thumbnail(DUG20_01_ETB_ETA_detail.jpg, size=400)}} |
| 40 | 1 | laforge | |
| 41 | 7 | laforge | Pinout: FIXME |
| 42 | 1 | laforge | |
| 43 | h3. ESB port |
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| 44 | |||
| 45 | note that its a bit smaller than the sfp slots |
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| 46 | |||
| 47 | {{thumbnail(DUG20_01_ESB_detail.jpg, size=400)}} |
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| 48 | |||
| 49 | h3. LMT B, LMT A, EC, GPS |
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| 50 | |||
| 51 | {{thumbnail(DUG20_01_LMT_GPS_detail.jpg, size=400)}} |
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| 52 | |||
| 53 | 7 | laforge | h3. LMT A |
| 54 | |||
| 55 | LMT (Local Maintenance Terminal) A hosts a RS-232 port used for connecting to the DUG 20 from a PC running the OMT software. |
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| 56 | |||
| 57 | 8 | laforge | |_.RJ45|_.DB-9 (female)|_.Signal| |
| 58 | |1|5|GND| |
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| 59 | |2|3|TxD| |
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| 60 | |3|2|RxD| |
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| 61 | |||
| 62 | 1 | laforge | h3. LMT B |
| 63 | 9 | laforge | |
| 64 | Site-LAN and LMT B |
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| 65 | 7 | laforge | |
| 66 | FIXME |
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| 67 | |||
| 68 | h3. EC |
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| 69 | |||
| 70 | FIXME. |
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| 71 | |||
| 72 | h3. GPS |
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| 73 | |||
| 74 | This port is meant for attaching an external GPS receiver. The connector includes |
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| 75 | * RS485/422 receiver for NMEA from the GPS |
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| 76 | * RS485/422 transmitter for command to the GPS |
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| 77 | * RS485/422 receiver for 1PPS signal from the GPS |
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| 78 | * 12V power supply for the GPS |
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| 79 | |||
| 80 | 1 | laforge | h3. 48V DC in |
| 81 | |||
| 82 | Connectory type is a https://www.te.com/usa-en/product-1982299-3.html with associated crimp contacts. |
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| 83 | |||
| 84 | {{thumbnail(DUG20_01_DC_in_detail.jpg, size=400)}} |
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| 85 | |||
| 86 | 7 | laforge | |
| 87 | 3 | roh | h3. Connector on the Back |
| 88 | |||
| 89 | 7 | laforge | This connector is not used during normal operation. We assume it is for factory / service use only. |
| 90 | |||
| 91 | 3 | roh | {{thumbnail(DUG20_01_backplane_detail.jpg, size=400)}} |
| 92 | 7 | laforge | |
| 93 | |||
| 94 | h2. LEDs |
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| 95 | |||
| 96 | {{thumbnail(DUG20_01_LED_detail.jpg, size=400)}} |
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| 97 | |||
| 98 | |||
| 99 | 3 | roh | |
| 100 | h2. Overview Pictures |
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| 101 | |||
| 102 | {{thumbnail(DUG20_01_front_perspective.jpg, size=400)}} |
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| 103 | {{thumbnail(DUG20_01_left_perspective.jpg, size=400)}} |
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| 104 | {{thumbnail(DUG20_01_right_perspective.jpg, size=400)}} |
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| 105 | {{thumbnail(DUG20_01_back_perspective.jpg, size=400)}} |
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| 106 | {{thumbnail(DUG20_01_bottom_complete.jpg, size=400)}} |
