17.31. LPRN - Permanent station number suppression for EDSS1 CO 
Feature:
Display suppression
Function:
COT parameter LPRN - Line With Permanent Restricted Numbers - can be used to activate
permanent number suppression on a breakout trunk for an EDSS1 CO for all outgoing
D channel
signals - irrespective of any terminal-specific generations.
The LPRN function applies to Basic Call, Call Diversion and explicit Call Transfer,
as well
as the service elements CLIR (Calling Line Number Identification Restriction) and
COLR
(Connected Line Number Identification Restriction).
Device types:
Digital CO trunk circuits
Network protocols:
For example, EDSGER (EDSS1 protocol for Germany), EDSAUT (EDSS1 protocol for Austria),
EDSSUI (EDSS1 protocol for Switzerland), EDSFRA (EDSS1 protocol for France), ETSI
(Standard
EURO-ISDN)