SIP Telephony
166
Voice over IP (VoIP)
Internal SIP Subscribers
The Forum 5000 becomes available as the SIP server for internal SIP
subscriber telephony switching services. SIP telephones connected via LAN or
SIP programmes installed on workstation computers can thus establish
connections to all other devices or trunks connected to the Forum 5004/
5008/5012.
Licence assignment
The number of possible SIP subscribers is determined by the number of
licences purchased. In order to provide you with the greatest possible
flexibility regarding usage of available licences, licence assignment is
dynamic via the “Floating licence”. Using a user/password combination (“SIP
log on”) you can have several SIP subscribers under the same call number.
Only every new SIP log-on occupies a new licence. The technical log-on
process of a SIP subscriber with a valid user name and correct password is
always successful. If all licences are occupied currently, the SIP subscriber
can only make emergency calls.
Note:
If the technical log-on is not successful due to an incorrect user
name or incorrect password, the SIP subscriber cannot establish
any connections – no emergency calls either.
When a SIP subscriber logs off, when terminating the programme, for
example, the associated licence will become available immediately. A licence
is also made available when a SIP subscriber’s regular status query is not
conducted. The internal clock for automatic log-out is determined by the
Profile
assigned under
Telephony
:
Devices
:
VoIP phones
. The (
Keepalive
)
internal clock setting is located on the
Telephony
:
Extended
:
VoIP profile
page.
Detailed information on the current licence assignment and on logged-on SIP
subscribers is located on the
System Info
:
Telephony
:
SIP phones
page. This
page is where you can reset licence assignment at any time by clicking on
Reset licences
.
Technical notes
The names of settings for the various SIP telephones or SIP programmes are
not uniform unfortunately. Please refer to the
(Help)
on the
Telephony
:
Devices
:
VoIP phones
page and the following notes when configuring SIP
subscribers: