5.15. ISDN Protocol Variants 
The initialization for the PD tables has been transferred from the database to the
HD. The
following command is sufficient for initialization of the memories for the PD tables:
COPY-PRODE:PVCD,1;
The above command writes the initialization data for the
PD tables to the database, initializes the general section and loads
all assigned PDs.
The protocol descriptor tables consists of a general section and the
PD tables. This applies both to the database (DB) and the hard disk (HD)
The general section is referred to as the variant table (VARTAB).
It defines the relationships between the protocol descriptors (PD) and
the protocol variants.
The hard disk contains up to 40 versions of these variant tables,
each for a particular country. On the HD the tables are termed protocol
variant combination descriptors (PVCD).
The PVCDs and PDs on the hard disk can be displayed with the following
commands:
DISPLAY-PRODE:SRC=HD,KIND=PVCDSHRT; DISPLAY-PRODE:SRC=HD,KIND=PDSHORT;
Outputs, see AMO description.
The PVCDs/PDs are numbered for HD access and are addressed by means of PVCDNR or PDNR.
The database protocols activated can be displayed with the following commands:
DISPLAY-PRODE:SRC=DB,KIND=PDSHORT; DISPLAY-PRODE:SRC=DB,KIND=VARTAB;
Outputs, see AMO description.