Reference 1: PTT table for ring signal +--------------------------+------------+----------------------------------+ |Country V (Code)idx | Ring Freq. | Ring Cadence (100ms) | | | (Hz) | On Off On Off On Off Ref.| +--------------------------+------------+----------------------------------+ | USA * (255) 1 | 40 | 10 , 30 rc0 | | S. Africa * (254) 2 | 40 | 10 , 30 rc0 | | Netherlands (253) 3 | 25 | 10 , 40 rc0 | | Denmark * (252) 4 | 25 | 10 , 70 rc0 | | Switzerland * (251) 5 | 25 | 10 , 40 rc0 | | Sweden * (250) 6 | 40 | 10 , 50 rc0 | | UK (249) 7 | 40 | 4 , 2 , 4 , 20 rc2 | | Belgium (248) 8 | 25 | 10 , 30 rc0 | | Greece (247) 9 | 50 | 10 , 40 rc0 | | Czechia (246) 10 | 40 | 20 , 30 rc0 | | Norway (245) 11 | 25 | 20 , 30 rc0 | | Australia (244) 12 | 40 | 4 , 2 , 4 , 20 rc2 | | New Zealand (243) 13 | 40 | 20 , 30 rc0 | | Hong Kong (242) 14 | 40 | 20 , 30 rc0 | | Singapore (241) 15 | 40 | 4 , 2 , 4 , 20 rc2 | | Finland * (240) 16 | 25 | 10 , 40 rc0 | | Marocco (239) 17 | 40 | 20 , 30 rc0 | | Taiwan (rack)* (238) 18 | 40 | 10 , 30 rc0 | | Germany * (237) 19 | 40 | 10 , 40 rc0 | | Italy (236) 20 | 20 | 20 , 30 rc0 | | Ireland (235) 21 | 40 | 4 , 2 , 4 , 20 rc2 | | Japan * (234) 22 | 40 | 10 , 20 rc0 | | Austria (233) 23 | 50 | 20 , 30 rc0 | | Malaysia (232) 24 | 40 | 20 , 30 rc0 | | Poland (231) 25 | 40 | 20 , 30 rc0 | | Russia * (230) 26 | 40 | 10 , 30 rc0 | | Hungary (229) 27 | 40 | 20 , 30 rc0 | | Slovakia (228) 28 | 40 | 20 , 30 rc0 | | Thailand (227) 29 | 40 | 20 , 30 rc0 | | Isreal (226) 30 | 40 | 20 , 30 rc0 | | Switzerland * (225) 31 | 40 | 10 , 40 rc0 | | UAE (224) 32 | 40 | 20 , 30 rc0 | | ChinaT (223) 33 | 40 | 20 , 30 rc0 | | China * (222) 34 | 40 | 10 , 30 rc0 | | Ukraine (221) 35 | 40 | 20 , 30 rc0 | | Portugal (220) 36 | 20 | 20 , 30 rc0 | | France (219) 37 | 50 | 10 , 30 rc0 | | Korea mu-Law (218) 38 | 40 | 10 , 30 rc0 | | Korea A-Law (217) 39 | 40 | 10 , 30 rc0 | | Spain (216) 40 | ?? | ?? , ?? rc0 | | India (214) ?? | ?? | ?? , ?? ??? | +--------------------------+------------+----------------------------------+ For TA128, the optional frequencies are: 20, 25, 40, 50 Hz For E2864I and omni.net, the optional frequencies are: 20, 25, 30, 50 Hz |