... ,Vista,XP,2003/2000,Linux,Mac...OS. GSM sms gateway parameters: Phone interface: supply RJ-11 Phone InterfaceHanging voltage ... : EU,US,AU,British can be optional GSM sms gateway Operation Circumstance: Operation temperature: -10c~60CStorage temperature:-20C~ ... landline calling +IMEI changing 32 port 128 sim gsm sms gateway pictures : Model numberGSM SMS gatewayMain functionBulk sms +landline call ...