DUG 20 » History » Version 8
laforge, 08/09/2020 02:02 PM
1 | 1 | laforge | h1. DUG 20 |
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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. |
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7 | 3 | roh | {{thumbnail(DUG20_01_front_complete.jpg, size=900)}} |
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9 | 4 | roh | {{>toc}} |
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11 | 2 | laforge | h2. Technical data |
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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 |
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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 | |||
63 | |||
64 | 7 | laforge | h3. LMT B |
65 | |||
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 |
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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 | |||
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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)}} |