B-28
Operator's Manual
Oper
ati
o
n
If you have an SD-420 system display (optional accessory) connected to your PBX (if avail-
able in your country), you can query various status conditions in the system. You must
assign the system display to an extension at which you want to make this query (see Chap-
ter Assigning a System Display on page I-73 in the Installation and Configuration Manual).
This extension should be a DTMF or an ISDN telephone, since you need the
*
key for the
menu-driven query. (On many ISDN telephones, the
*
key is not assigned to a function).
In its basic status, the system display shows, amongst other things, the time and the assign-
ment overview, i.e. it informs you of the B channels that are currently busy and the sub-
scriber who is are currently making a call. Apart from this, a message line shows incoming
calls or the settings that currently apply at the associated telephone.
As soon as you lift the handset of the telephone to which the system display is assigned (by
default Ext 31), the system prompts you to dial. If you now press the
*
key, the system dis-
plays the main menu containing the query functions. There is a digit before each menu item
that you punch in to choose the respective submenus. Pressing the
*
key always takes you
back to the previous menu. Operation is simple and intuitive.
If a subscriber doesn't replace the handset properly or makes a relatively long pause while
punching in a number, the system shuts down the extension after 60 seconds (10-15 sec-
onds with ISDN telephones) and applies the engaged tone. This prevents this extension
from blocking the PBX. The function that the subscriber wanted to initiate but did not com-
plete is aborted on shutting down. It is not possible to call a shut-down extension. You hear
the engaged tone. To reverse the shutdown condition, replace the handset.
You can get information on new features in the Internet.
The update changes the version number of the firmware. You can query it by means of
the user program and by telephone (see Chapter Automatic Firmware Update on page I-69
in the Installation and Configuration Manual) or on an SD-420 system display (optional
accessory) that may be connected.
The system of course retains your call data, wake-up times and configurations. Only the
operating software of your PBX is updated.
Your PBX already knows the calling number of the server. If the calling number for the
automatic firmware update should ever change, you can use a programming function to tell
the PBX the new number (see Chapter Automatic Firmware Update on page I-69 in the
Installation and Configuration Manual).
1. 35
Operating an SD-420 System Display
1. 36
Automatically shutting down extensions
