... converter ,can be linked with 8 RJ11 telephone ,change your SIM singal to fixed telephone.3.Caller ID display ,can ... or call out times3) It can connect with ordinary telephone set, PBX , VOIP Gateway, Billing meter etc.;4 ... to 9 secs by setting up from telephone set;8) Can adjust voice volume by setting up ... from telephone set;9) SIM card supported (1.8V, 3V);8) Caller ID display;9 ...