AASTRA SIP-DECT (Release 2.1)- OM System Manual - Installation, Administration and Maintenance EN - Manual (Page 20)

SIP – DECT OM System Manual Release 2.1 2 Getting Started
depl-1230/1.3 Page: 20 (196)
SIP: System, connect to PBX & change portable part SIP configuration
10 Navigate back to the Portable parts page. Click the icon next to the desired portable
part entry to open the respective Configure portable parts dialog. Change to User name
and Password fields under the SIP authentication heading to the SIP account
credentials configured on the PBX (see chapter 5.4.2 and chapter 5.7.1). Note, that the
entered
User name is sent to the PBX as “authorization username” within the SIP
“REGISTER” message.
Verify the SIP registration, for example on a status display of your PBX as shown above.
Place a test call from the DECT portable part to another phone attached to the PBX.
The next steps depend on your requirements and would typically include setting up a
standby OMM (see chapter 7.11) or setting up the Download over Air software-update for
Aastra 610d/620d/630d portable parts (see chapter 7.15).