Mechanical Signals and Boards

Haltetafel und alleinstehende Vorsignaltafel  A standalone Ne 2 board (i.e. a distant signal post plate). The H-board instructs a halting train to stop here. This picture was taken at Hamburg-Dammtor track 1 (S-Bahn), and since the signals are placed to the left of the track, they are meant for wrong track operation. Should in a rare event a train be required to use the left line towards Hamburg Hbf, there is no colour light signal, but the standalone distant signal post plate tells the driver that he is approaching a main signal which may show stop and hence drive at appropriate speed.
Sh 0: keine Weiterfahrt...  One could suspect that driving beyond is not advisable, but to make sure DBAG puts an Sh 0: stop-no passing signal onto every buffer.
Sh 0 An Sh 0 marks the end of track in Rostock Hbf.
Sh 2 an einem Einfahrstumpfgleis  At dead entry routes, instead of an Sh 0, an Sh 2 board is placed. This is a track at Hamburg-Altona.
Ankündigungsbake  So 17 Ankündigungsbake (Announcement board) for So 18 signal.
Geschwindigkeitsbegrenzung 200 km/h  A DB Lf 7: From here on, the maximum speed is 200 km/h.
Note that this is a special case: Usually, only the begin of a speed restriction is signalled, so you are unlikely to see a 200 km/h signal.
This one is on the Augsburg-Donauwörth line which is equipped with the experimental Sk signalling system (see there). One of its properties is that every speed change is signalled: this sign here is really an end of speed limit - resume 200 km/h line speed signal.
Geschwindigkeitsbegrenzung 50 km/h erwarten  A DR Lf 4 (permanent speed restriction warning board) giving advance notice of a speed restriction of 50 km/h.
Baustelle, 70 km/h erwarten  Lf 1: Expect a temporary speed restriction (in this case: 70 km/h)
DR-Wartezeichen  A DR Ra 11a waiting sign (DB: Ra 11) with a Kreisscheibe at Rostock Hbf. The number plate 4II tells us that for waiting signs the same numbering scheme as for line-close signals is used.
lfe.jpg (203914 Byte)  An DR Lf 5 Eckentafel ("Corner Board"):

Begin of announced speed limit.

so106l.jpg (24682 Byte)  A So 106 Kreuztafel. On branch lines this indicates the place where a distant signal would be, and will in the future probably be replaced by an Ne 2 Vorsignaltafel (distant signal board). The meaning is that you should prepare to stop in front of a Trapeztafel (trapeze board).
Trapeztafel  A Trapeztafel (Ne 1). On the full picture, you can also see an Lf 7 speed limit board for 40 km/h, and a line-close signal displaying a Kennlicht (marker light) to indicate that it is switched off.
Pfeiftafel  A Pfeiftafel (Bü 4 - whistle board). The additional board with the two black stripes tells us that there is a regular stop between this whistle board and the level crossing, and this whistle board is valid only for trains not stopping before the level crossing. For halting trains, another whistle board will be placed after the halt.