Project

General

Profile

DUS 31 » History » Version 2

laforge, 11/03/2020 03:28 PM

1 1 laforge
h1. DUS 31
2
3 2 laforge
The DUS 31 is the first digital unit (we know) which supported multi-standard on the same DU.  As you can run both LTE and GSM on the same unit, it basically combines a DUL and a DUG.
4
5
The GSM back-haul is no longer exposed via E1/T1 TDM lines, but uses _Ericsson PacketAbis over IP_, which is basically the L2TP/HDLC based protocol stacking that the [[SIU 02]] or the [[TCU]] would have traditionally generated.
6
7 1 laforge
h2. Mass Storage
8
9
The unit has an internal 8GB USB Mass Storage device, as a _Micron Embedded USB Mass Storage Drive (e230)_. You can think of it as a USB thumbdrive, but not with an exterenal USB A plug, but with a 9-pin 2-row 2.54mm pitch receptacle, which can be plugged directly onto USB 2.0 headers on mainboards.
10
11
The partition table looks as follows:
12
<pre>
13
Disk ./dus31.dd: 7.56 GiB, 8120172544 bytes, 15859712 sectors
14
Units: sectors of 1 * 512 = 512 bytes
15
Sector size (logical/physical): 512 bytes / 512 bytes
16
I/O size (minimum/optimal): 512 bytes / 512 bytes
17
Disklabel type: dos
18
Disk identifier: 0x00000000
19
20
Device      Boot   Start      End  Sectors   Size Id Type
21
./dus31.dd1            4  1999999  1999996 976.6M 21 unknown
22
./dus31.dd2      2000000 13999999 12000000   5.7G 21 unknown
23
</pre>
Add picture from clipboard (Maximum size: 48.8 MB)