10.44.2.1. SLMA Access 
The customer dials the access number for the voice paging circuit
and is automatically connected.
The voice paging circuit can be dialed from basic call or consultation
dial states.
However, depending on the method of configuration (refer to Section 134.4.1
on page 134-1371), most features may not be permitted when connected
to voice paging equipment. For example, the following features may NOT
be permitted. This is new for OpenScape 4000.
- conference
- transfer
- call forward to voice page destination
- toggle
- park
- any type of hold
- callback
- message waiting
- override
- camp-on