APS Alger :

 

listen to the RTTY test slip, recorded in 1992 (rb) just in case you have no decoder at hand ;-)

 

a friendly verification letter from the collection of Andreas Ibold (1986)
this letter from 1990 gives you the complete transmission schedule (Ary Boender)

 

------------------------------------------------------------

 

Frequencies Radioteletype:
4380
9380
10340
14932
15480

 

Systems used:
50 Bd