Siemens Enterprise OpenStage 40 SIP IP-phone is a great solution for people working in the permanent place. This model features a large display and easy setup of various protocols such as TDM, HFA and SIP.
CircuitID provides high-quality Wholesale VoIP Termination, Origination, Toll-Free, and Microsoft Lync SIP Trunking services, at a low affordable cost. Experience carrier class quality, and savings benefits.