What Is SIP Trunking?
SIP (Session Initiation Protocol) trunks are virtual/cloud-based phone lines. As a standard method of managing VoIP (voice over internet protocol) systems, SIP allows for calls to be made and received over an internet connection, instead of traditional copper phone lines, between two telecommunication endpoints.
SIP is a protocol that was defined by the independent IETF. Explore our resources to learn more about how a VoIP system works.
What Is a SIP Trunk Channel?
“Trunking” comes from the telecom industry’s past, in which copper phone lines were grouped and bound together, creating large trunks of cable.
A SIP channel is what supports incoming and outgoing calls. A trunk contains numerous channels or virtual telephone lines.
Telecom service providers (TSPs) can supply a SIP trunk and use it to provide channels to a PBX (private branch exchange).
Refer to the SIP trunk diagram below to get a sense of what SIP trunking is like in practice.
The word “trunks” comes from the telecom industry’s past, in which copper phone lines were grouped and bound together, creating large trunks of cable.
[ultimate_heading main_heading=”What are some common SIP trunk features?” alignment=”left” spacer=”line_only” spacer_position=”bottom” line_height=”1″ margin_design_tab_text=””][/ultimate_heading][ultimate_icon_list css_icon_list=”.vc_custom_1579555089552{margin-top: 20px !important;}”][ultimate_icon_list_item icon=”Defaults-check”]A SIP connection dynamically adjusts to optimize available bandwidth at about 120K, and when not in use, does not use any bandwidth[/ultimate_icon_list_item][ultimate_icon_list_item icon=”Defaults-check”]Scalability is one of SIP’s defining features. You can add as many virtual phone lines to your connection as you need. [/ultimate_icon_list_item][ultimate_icon_list_item icon=”Defaults-check”]Failover routing can reduce disruptions and increase up-time.[/ultimate_icon_list_item][ultimate_icon_list_item icon=”Defaults-check”]Add/remove channels as needed to handle more inbound calls.[/ultimate_icon_list_item][/ultimate_icon_list]
[ultimate_heading main_heading=”What is the benefit of SIP Trunking?” alignment=”left” spacer=”line_only” spacer_position=”bottom” line_height=”1″ margin_design_tab_text=””][/ultimate_heading][ultimate_icon_list css_icon_list=”.vc_custom_1579555089552{margin-top: 20px !important;}”][ultimate_icon_list_item icon=”Defaults-check”]A SIP channel makes it easier for your customers to contact you through improved up-time and call management.[/ultimate_icon_list_item][ultimate_icon_list_item icon=”Defaults-check”]SIP calling can potentially offer reduced call charges and lower communication costs.[/ultimate_icon_list_item][ultimate_icon_list_item icon=”Defaults-check”]SIP with Shaken/Stir support helps minimize spam calls and increase the amount of authenticated calls you’ll receive.[/ultimate_icon_list_item][/ultimate_icon_list]
Learn more about the benefits of updating your legacy phone systems.
How do I choose the right SIP Provider?
Whether your goal is to reduce costs, add network and telecom features, or increase the flexibility and scalability of your business phone system, the key is working with a provider you trust. A good telecommunications provider will take the time to explain what SIP trunking is in detail, explain all your options, and answer any questions you have about implementation.
What should I ask my potential SIP providers?
It’s a good idea to do your own research before you talk to service providers. Ask them about:
- Pricing – costs and service can vary. Ensure you’re comparing apples to apples.
- Security – look for a secured network with robust system monitoring.
- Support – don’t underestimate the importance of this. Ask about the quality and experience of their support team, and what kind of hours are built into the contract. Don’t hesitate to ask for references or look up online reviews of their service.
- Number porting – can the provider port your existing numbers? You shouldn’t have to email all your clients and customers new contact numbers just because you’re changing service providers.
If you have additional questions about what SIP trunking is, what a trunk channel is, and what SIP can do for your business, simply get in touch with us. You can speak to one of our industry experts for a free consultation and a quote for your upgrade