User Guide
Page 23
...denote a device that works over ISDN (Integrated Services Digital Network) or T-ISDN (UR-2). The ZyXEL Device is recommended for firmware upgrades and configuration backup/restore. • TR-069. Only use firmware for 1 or 3). ADSL Router Series User's Guide 23 Note: Not all models have all... of the features shown in "1", for example P-660HN-T1, denote a device that works over the analog telephone system, POTS (Plain...
...denote a device that works over ISDN (Integrated Services Digital Network) or T-ISDN (UR-2). The ZyXEL Device is recommended for firmware upgrades and configuration backup/restore. • TR-069. Only use firmware for 1 or 3). ADSL Router Series User's Guide 23 Note: Not all models have all... of the features shown in "1", for example P-660HN-T1, denote a device that works over the analog telephone system, POTS (Plain...