co
M
.sat
ISDN Basic
created: page:
file:
16/01/09
49
coMsat ISDN Basic Manual V2.7.doc
Note Protection Mark according to DIN 34!
can benefit from the supplementary services. Therefore the virtual PBX feature is
also useful even if there is already a PBX available.
The virtual PBX functionality is only available if a special license is obtained. The
license is set by the command “
Set License
” in the “
Info
” menu (see 3.3.12.6) and if
available, its status is displayed below the VPBX configuration.
The supplementary services are invoked by dialling preconfigured digits/signs.
Configuration and usage of these services is explained in detail in the chapter
“Configuration”.
At any time only one of the two connected users is able to invoke the virtual PBX
feature:
•
If an internal user (internal ISDN user or GSM user configured as VIP) calls an
external user, the internal user is able to use the services.
•
If two internal users are connected, only the calling user is able to invoke the
services.
The second rule can be changed for calls from an internal ISDN user to a GSM VIP
user in NT mode. If the last option in the configuration part of the dialog, „
For calls
from PBX
...“, is activated, then the GSM VIP user would be able to use the VPBX in
such call. This is useful if a PBX is connected to the
co
M
.sat
ISDN Basic
which also
implements the VPBX supplementary services. If it is not activated, which is the
default setting, then the ISDN user can invoke the VPBX supplementary services.
This is usually needed if no PBX is connected.
Please Note: If the device is configured in TE mode, all calls from ISDN are
considered to be external calls.
3.3.12.2 Configuration
Three digits need to be specified which are used to invoke the call hold (”
Hold
request digit
”), call retrieve (”
Retrieve request digit
”) and call transfer service
(”
Transfer request digit
”). All ten digits (0, 1, ...9) and the * or # signs are allowed. It
is possible to configure multiple digits, so that an erroneous invoking of a virtual PBX
function can be avoided. In this case, the desired function is activated if the
configured digits are received in the order specified. The time between the dialling of
the digits does not matter.
For transferring a call inside the GSM network, an additional setting, the transfer
code, is needed. This is a string containing the digits that would be dialled manually
on a cellular phone, followed by the send key (same as hook off). Usually these are
three digits with ‘*’ in front and ‘#’ behind them, like “*199#“. The network provider
supplies this information.
If phones connected to the internal ISDN shall be able to call other internal ISDN
phones, it is also necessary to add suitable routing information to the routing table. If
e.g. internal phones have the phone numbers 10-29, an entry is needed that
indicates local routing of numbers starting with “1” or “2” within the internal ISDN
(PBX).
