Features: 1.Based on GSM 900/1800MHz or 850/1900MHz 2.Support reverse polarity 3.Can connect to PBX. 4.With PSTN port 5.Support GPRS (optional) 6.Support Call-transfer PSTNGSM - Update: 2009-11-19

4Channel GSM Gateway SC-455 4Tel+ 4PSTN;Follow-me call transfer, LCR; Connect with 4FXS+4FXO of VoIP Gateway or IP PBX; GSM Prefix No. Setting (50 sets); Dual band, Multi band 850 1900 1800MHz; FCC, CE - Update: 2009-11-18

1 Channel GSM Gateway SC-355D with LCD 1SIM 1Tel 1PSTN Call Transfer, LCR;with Call transfer for GSM PSTN conversion. Dual band 900 1800MHz, quad band 900 1800 850 1900MHz, Connect with PBX or VoIP Gateway; SC-355DP with 1SIM 1Tel, 1PSTN, LCR withou... - Update: 2009-11-18

1 Channel with 2SIM GSM Gateway SC-355D-2 2SIM 1Tel 1PSTN LCR SIM A SIM B, SIM A-> PSTN, SIM B -> PSTN, LCR; 100+ groups prefix number setting, Quad band 850 900 1800 1900MHz - Update: 2009-11-18

SCG-31-V: VoIP is included. Dual Band 900 1800MHz Tri band 900 1800 1900MHz, Multi band 850 1800 1900MHz, Connect ISDN E1/PRI of PBX or E1 Trunk Gateway, 5U, Industry PC built in; CE APPROVAL - Update: 2009-11-18

1Channel GSM FWT SC-600 with 1SIM 1PSTN; SC-601 with 1SIM 1Tel; reverse polarity (12KHz is option);Quad band GSM 850/900/1800/1900MHz; Support reverse polarity 12kHz, connect PBX - Update: 2009-11-18

4 Channels GSM FWT SCG-4Q with 4SIM 4Tel Quad band 850 900 1800 1900MHz, reverse polarity, Connect to PBX, Tel set, Billing;(12/16KHz is option) - Update: 2009-11-18

8 Channels GSM FWT SCG-8Q with 8SIM 8Tel ;GSM 900 1800MHz or 850 1900MHz, with reverse polarity to connect with PBX, Tel set, Billing (12KHz/16KHz is option) - Update: 2009-11-18

GSM Fixed Phone (FWP) SC-9020; With battery support & external power adapter GSM 850/1900MHz or 900/1800MHz; CE - Update: 2009-11-18

GSM Gateway with 1SIM, 1tel+1PSTN;Follow-me call transfer, LCR SC-355 gives you both a reduced phone bill and a convenient phone conversation! - Update: 2009-11-18