User Guide
Page 23
...Digital Network) or T-ISDN (UR-2). Models ending in "1", for example P-660HN-T1, denote a device that works over the analog telephone system, POTS (Plain Old Telephone Service). ADSL Router Series User's Guide 23 The ZyXEL Device is an auto-configuration server used to share files via a USB memory...series includes the P-660HN-TxA, P-660HN-Tx, P-660N-TxA, P-660HN-T1H, P660HNU-Tx and P-660HU-Tx (x stands for your ZyXEL Device's specific model. Only use firmware for 1 or 3). By integrating DSL and NAT, you are ADSL2+ routers. Note: Not all models have all of the following ...
...Digital Network) or T-ISDN (UR-2). Models ending in "1", for example P-660HN-T1, denote a device that works over the analog telephone system, POTS (Plain Old Telephone Service). ADSL Router Series User's Guide 23 The ZyXEL Device is an auto-configuration server used to share files via a USB memory...series includes the P-660HN-TxA, P-660HN-Tx, P-660N-TxA, P-660HN-T1H, P660HNU-Tx and P-660HU-Tx (x stands for your ZyXEL Device's specific model. Only use firmware for 1 or 3). By integrating DSL and NAT, you are ADSL2+ routers. Note: Not all models have all of the following ...