Do I need MPLS to have SIP Trunking?

By Kristine Hegglin
Updated: February 08, 2011

MPLS

Multi-Protocol Label Switching (MPLS) was created in the 1990s to increase the forwarding speed of routers. However, MPLS has evolved to become a vital technology for large Internet Protocol (IP) networks. MPLS enables rapid data switching through labeled packets for all network protocols. These labels provide routing information to quickly identify the destination of the packet. MPLS provides tunneling of any protocol, which is why it is called “Multi-Protocol”. MPLS is the standard for most network service providers (NSP) and results in an increased speed of network traffic in addition to providing differentiated services based on traffic type and/or service level agreements (SLA).

SIP

Session Initiated Protocol (SIP) trunking is a type of Voice over IP (VoIP) service that a business may activate through an Internet Telephony Service Provider (ITSP). Businesses may save on telephone services with SIP trunking because this service can enable a PBX (private branch exchange) to not only work within the business, but also outside the business network with the use of VoIP and an Internet connection. With SIP trunking, businesses can send and receive calls via the Internet both within the company and outside.

While SIP trunking is a service, it is also a global protocol. SIP trunks are available through SIP vendors and cost less when used over an MPLS network. Not only can a business save money with SIP over MPLS, but that business will also benefit from robust functionality. And, with SIP over MPLS, businesses still have the functionality provided by plain old telephone systems (POTS).

Businesses do not need MPLS to have SIP trunking

These services may work independently of one another or together. When these two services work together, SIP acts as the call signaling protocol while MPLS functions as the network forwarding system. When a SIP service is used over an MPLS network, businesses benefit with improved voice quality, improved security, and robust features like video transfer. When the Internet was created, it was not designed to handle VoIP as VoIP was nonexistent at the time.

While the Internet has the ability to handle VoIP, VoIP used with SIP over MPLS networks provides greater benefits and is quickly becoming the new age communication solution. Not only can SIP over an MPLS network handle VoIP, but this new age communication solution can be an asset for cloud computing services. As VoIP continues to replace ISDN (Integrated Services Digital Network) telephony services, we will most likely see more businesses opting to use VoIP with SIP over MPLS versus VoIP with the Internet.

Featured Research
  • Is Your Phone System Stealing Profits?

    Having the wrong phone system can dramatically cut into your profits. Despite this, many businesses just sign up for a plan or platform that seems ‘good enough’. If you haven’t carefully considered your options and the included features, there’s a very good chance that you are leaving money on the table in some way. more

  • Phone System Technology Showdown

    VoIP and IP telephony are often misconstrued as being the same type of phone system, but the truth is they operate on different technology and deployment methods. This guide will explain the differences between VoIP and IP, go into the pros and cons of both VoIP and IP-PBX, and give insight into which type of phone system will benefit your business the most. more

  • Why Enterprises are Making the Switch to VoIP

    Your phone system is your most important business communication system. It allows you to connect with your employees, prospects, and clients. And wouldn't it be great if there was a solution that helped drive down costs while providing a competitive advantage? more

  • Business Phone System Buyer's Guide

    Communication has been a focal point in business since inception, but the industry is changing drastically in how people connect to one another and what tools and systems they use to do so. Less than 15 years ago, 90% of people relied on landline phone systems for communication. Today, less than 60% of Americans even have a landline and 40% rely solely on their mobile phone. more

  • The IT Manager's Survival Guide

    As an IT manager, maintaining physical fax servers and infrastructure is not a high priority. However, fax capability remains a business need simply because chances are your industry is dependent on its security. What if there was a way to reduce the amount of time spent handling fax complaints and maintaining physical servers? And this way took into account security, cost savings, and freed up your IT resources. Would you be interested? more