An HG 3500 is configured as a SIP trunking gateway. The parameters for the connection to the Web Based Management of the board (AMO CGWB, parameter MGNTIP and MGNTPN) and the backup server (AMO CGWB, parameter BUSIP and BUSPN) have to be configured.

After a reset of the board or after a loadware update the IP addresses (MGNTIP and BUSIP) are restored but not the port numbers (MGNTPN and BUSPN). These parameter values are set to the default value (in both cases „0“). Therefore a connection to the backup server cannot be established anymore. The needed configuration data for SIP trunking that has been configured in the WBM and has been saved on the backup server cannot be restored. The SIP trunking connection cannot be re-established again.

Check parameter in AMO CGWB and configure it again:

CHANGE-CGWB:MTYPE=CGW,LTU=<number>,SLOT=<number>,TYPE=MGNTDATA,MGNTPN=8000,BUS­
PN=443;

Or save the configuration data in the local flash of the board during installation of the board:

WBM > Maintenance > Config & Update > Save Local Configuration for Upgrade

For a detailed description, see "OpenScape 4000 V, Gateways HG 3500 and HG 3575, Administrator Documentation" ().