Lancom 1722 VoIP User Manual page 91

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.
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.
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'
Call routing procedure on outgoing calls
User dials
Branch VoIP 212
telephone
Branch VoIP 199
telephone
Branch VoIP 0 555 555
telephone
Branch VoIP 0 0123 666 666
telephone
→
page 90).
correct call
route
none
¿
#
»
0#
· ✐✐✃
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
LANCOM 1722 VoIP – LANCOM 1724 VoIP
Chapter 5: Configuring Voice over IP
correct user mapping,
number in
use
VoIP softphone 212
SIP subscribers #:
at the head- 199
quarters
0241#:
0241 555 555
00#:
0123 666 666
Destination
line
internal
SIP PBX
ISDN
SIP provider
91