User manual

Table of Contents
Centauri user manual revision level 01 /2007
37
5.1.8. Setting Dial Protection and ISDN Service Protection
Undesired calls and network queries can be blocked from the MERK II if necessary. Two
parameters are provided to this end:
– “Dial protection” and
– “ISDN service protection”
Dial protection allows you to determine whether or not the MERK II will accept all calls and
network queries, or only calls and network queries from callers who have already been
entered to the phone book.
ISDN service protection allows you to specify whether or not calls with certain ISDN
service indentifications will be ignored by the MERK II. The following service identifications
can be specified:
– no profile
– speech
– unrestricted dig. info
– restricted dig. info
– 3.1 kHz audio
– 7.0 kHz audio
– video
– packet mode
– 56 kB/s rate adapt.
– telephony
– facsimile 2/3
– facsimile 4/1
– teletex mixed mode
– teletex processable mode
– teletex basic mode
– videotext
– telex
– x.400
– x.200
– 7.0 kHz telephony
– video teleph. first
– video teleph. sec.
Each service identification can be individually enabled or disabled.
Attention!
Do not change dial protection or the service identification settings unless you know
exactly what to change. Desired calls might otherwise be inadvertently blocked as
well.
In order to set dial protection or select permissible service identifications at the housing
front panel, proceed as follows:
(a) Via the front panel:
• Select the SETUP option in the start mask (see Figure 4). The setup mask appears.
• Select SECURITY and press the key. The following mask appears:
Figure 34: The SECURITY Mask
• Select “Dial Protection” or “ISDN Service Protection” with the and keys and
then press the key.
• Select the desired parameter with the and keys and then press the key.