LANCOM 1722 VoIP – LANCOM 1724 VoIP
Chapter 5: Configuring Voice over IP
91
EN
Configuring the VoIP terminal equipment
The VoIP terminal equipment is configured as described in the preceding
examples. However, here, the SIP PBX VoIP domain and the internal numbers
configured in the SIP PBX are used.
Configuring the SIP PBX
In the SIP PBX, all users from the branch office network are entered with their
own internal number. For this purpose, either the shared password is entered
or a separate password is assigned for each user (’Shared or user-dependent
SIP PBX password’
→
page 90).
Call routing procedure on outgoing calls
Internal call between two VoIP terminal devices at the branch office. The
number dialed, '212', does not match any of the routes listed in the call
Automatic SIP user registration with the LANCOM and the SIP PBX.
By using the SIP PBX domain with VoIP terminal equipment, the user is registered in two ways:
Since registration takes place with a valid domain defined in the LANCOM, terminal
devices are registered as "local users".
Since the domain that is used does not correspond to the LANCOM's own VoIP domain, a
simultaneous attempt is made at registering with the upstream SIP PBX. If the password
used corresponds to the password stored in the SIP PBX for this user, then the registration
on the SIP PBX will be successful.
User
dials
correct call
route
correct user
mapping,
number in
use
Destination
line
Branch VoIP
telephone
212
none
VoIP softphone
212
internal
Branch VoIP
telephone
199
#
SIP subscribers
at the head-
quarters
#:
199
SIP PBX
Branch VoIP
telephone
0 555 555
0#
0241#:
0241 555 555
ISDN
Branch VoIP
telephone
0 0123 666 666
✐✐✃
00#:
0123 666 666
SIP provider
