10.20. Digital Station with S0 Interface 
Bus configurations
can be set up with various devices at the S0 interface (STMD or STHC
and STMD2) with PNT-E (SLMO24, SLMOP, STHC, etc.).
Device types
- Functional terminals are operated with the protocols SBDSS1 or SBNIBRI.
You can connect up to three devices with different services and protocols
but a single call number to the S0 bus. Only one protocol is permitted
per service.
The introduction of MSN call numbers lets you extend the number of
call numbers at the S0 bus beyond the above limits (only applies to functional
terminals and therefore not to all other types of configuration described
below - see also chapter "EURO ISDN Terminals", Section
120.2.1, "Multiple Subscriber Numbers (MSN) on the S0 Bus".
You can configure the following connection options:
- direct
- over PNT E (Private Network Terminator) at the Up0/E or ANSI-U NTBA
- as an "external" extension only at STMD (over public paths)
Configuration types
- Functional Bus (FBUS)
- S0 interface at the UP0/E port (see Chapter 133, "PNT E for Connecting Standardized S0 Telephones").