FAQ - Frequently asked questions
Frequently asked questions about technical terms in the telecommunications industry and Virtual-Call products. We explain complex terms in simple and easy-to-understand terms.
VoIP and SIP: A glossary of the most important terms
- What is SIP Forking and How Does It Work?
- Does Internet Speed Affect VoIP Call Quality?
- What Equipment Do I Need for VoIP?
- How Secure is VoIP Telephony?
- What are the Benefits of Using VoIP and SIP?
- What is the Difference Between VoIP and SIP?
- What is CLIP No Screening?
- What Does CLD Mean in Telecommunications?
- What Does an Auto Attendant Do in a Phone System?
- What is SMS Termination?
- What is UCaaS and How is it Used?
- What is PBX in Telecommunications?
- What Does "IP Protocol" Mean in Relation to the Internet?
- What are Codecs and How Do They Affect Internet Telephony?
- What is Bandwidth and How Does it Affect My Internet?
- What is the T.38 Protocol and What is it Used For?
- What Does "Latency" Mean and How Does it Affect Internet Connections?
- What is Jitter?
- What Does UDP Mean?
- What Does TCP Mean?
- What is a Softphone and How Does It Work?
- What Does RTP Stand For and How is It Used on the Internet?
- What Does QoS Mean?
- What is NAT in Networking?
- What Does a STUN Server Do?
- What is VoIP and How Does It Work?
- What is SIP and What Does It Do in Internet Calls?
- What is an IVR?
- What Does DID Mean in Communication?
- What is SIP Trunking in Internet Telephony?
- What is a Cloud PBX and What is it Used For?
- What Does CLI Mean in Phone Calls?
Cloud PBX
- What is call recording?
- What is IVR?
- What is a queue?
- Was ist Voicemail?
- What is a Direct Dial?
- What are Ring groups?
- Can I use one user on several end devices?
SIP Trunk
- What is Virtual-Call's SIP trunk service and how does it optimize business communication?
- How can I modernize and optimize my telephony solution with the SIP trunk service from Virtual-Call?
- How can I optimize my international presence with Virtual-Call's SIP trunk and international services?
International SIP trunks
- In which countries can I use the international SIP trunk from Virtual-Call?
- Are emergency calls possible via the international SIP trunk of Virtual-Call?
- Can I call toll-free numbers (0800) via Virtual-Call's international SIP trunk?
- Are all calls terminated nationally?
- Can I port my existing telephone numbers?
MS Teams Direct Routing
- What is Microsoft Teams Direct Routing?
- Do I need special knowledge in PowerShell to use the MS Teams Direct Routing Service?
- Do I have to hire an external IT company to set up the MS Teams Direct Routing Service?
- With which products can I use the MS Teams Direct Routing Service from Virtual-Call?
- Do I receive support in setting up the MS Teams Direct Routing Service?
- I don't have any Microsoft licenses yet. Can Virtual-Call help me with this?
