SIP TrunkingThe cost-effective, flexible alternativeto ISDN for voice calls

Gamma SIP TrunksReliable voice services withflexibility and continuitySIP trunking is rapidly replacing ISDN services for inbound andoutbound voice calls. Gamma is the UK’s leading SIP trunks provider.Our SIP trunks connect your site’s PBX directly into the Gammanetwork via an internet connection to carry and terminate your callsacross the public telephone network.With BT due to turn off ISDN in 2025, there’s never been a bettertime to discover how switching to Gamma SIP Trunking canbenefit your business.Gamma SIP Trunks provide a highly-flexible alternative toISDN and are compatible with all the leading IP PBX brandsin the UK market, giving you peace of mind that your PBXhardware works with the network service.Compared to ISDN, Gamma SIP Trunks are cheaper on a perchannel basis and more flexible in terms of what telephonenumbers you can have and the locations in which you canhave them. In addition, they are quicker to install and offera robust business continuity service that ensures yourbusiness never loses any calls.Any business with a PBX can switch to our SIP trunkingservice and immediately benefit from a more flexible, lessexpensive and more resilient phone service.

How it worksGamma SIP Trunks connect your PBX to Gamma’s network,enabling full PSTN breakout on the public telephone network.Connection from your site (or sites) to our network is via aninternet connection (broadband or ethernet) or a privateaccess circuit for more secure services. The service isdelivered end-to-end with a 99.99% availability, voicechannel guarantees and voice Quality of Service.GammanetworkIP PBXYourpremisesEthernet orfibre connectionYOUR EQUIPMENTACCESSGammaSIP TrunksPublicphone networkGAMMA SERVICE / NETWORKGamma SIP Trunks are conformance tested with all UK IP PBX manufacturers. These are some of the IP PBX and SIP Gatewayvendors we work with:PBX on your premises or in the cloudUsing Gamma SIP Trunks, your PBX can be located either at your company site or housed within a managed colocation centreprovided by Gamma where you don’t need to be concerned about space, power or support engineers to look after your PBX.Either scenario is possible and for added resilience and flexibility you may wish to use a combination of both support models.PBXLondonYour VPNnetworkGammanetworkPublicphone networkManchesterPBXCOLOCATIONGAMMA SIP TRUNKS

Smarter workingSave money, work flexibly and collaborateSave money on calls and line rentalCompatible with business networks and appsGreat features with free internal callsDirect Routing provides connectivity to your Microsoft Team’stenant enabling full PSTN breakout on the public telephonenetwork. Connection from Microsoft Teams to our networkis via an IP connection (for example Gamma Broadband orEthernet) and is delivered as an end-to-end service with highservice availability.SIP trunking delivers less costly, more reliableconnectivity than ISDN over an internet connection.It can save up to 50% on line rentals and 25% or more on callcosts.Perfect for medium or large organisations with multiple sites,SIP Trunking will you save on your line rental and call costs andyou’ll get free internal calls within your organisation togetherwith a whole host of great features.Scale up and down when you need toSIP trunks are ideal if you are moving, upsizing or downsizingand want to keep your existing numbers. Scale up lines duringbusy periods and back down again afterwards. You can addlines, take them away, split calls at any time. You are always incontrol.Business continuity built inSIP trunks can handle emergencies easily. They are inherentlydisaster recovery / business continuity ready, letting youreroute calls to an alternative location quickly and easily.Gamma has built a bespoke Direct Routing architecture toenable full voice capability natively into Microsoft Teams.Any company using Microsoft Teams as theirunified communications tool can choose toimplement Gamma as their preferred provider forvoice and benefit from cost savings, increasedfunctionality and support for migration.We’re also a Janet-connected partner with an interconnectto provide voice services through Gamma SIP Trunks to theJanet community. Janet is the network dedicated to the needsof research and education in the UK, connecting institutions toeach other, as well as to the rest of the world.

PCI DSScomplianceThe Payment Card Industry Data Security Standard (PCI DSS)is the proprietary information security standard defined bythe major card companies to help combat fraud and protectconsumer card data. Its members include Visa, MasterCard,American Express, Discover and JCB. PCI DSS applies toall organisations that store, process or transmit cardholderinformation, from any of these members’ cards. The type ofannual assessment required varies according to “level”, whichis defined according to the volume of payment transactionsthat are handled.With 327 controls to consider in total, it is vital to ensure youhave them all ticked. The effects of being non-compliant canbe disastrous for a business due to the very real financial riskof opportunistic agent fraud and the associated reputationalrisks. Some of these include: Compromising your customers’ payment data Loss of customers, damage to brand and reputation Expensive lawsuits and insurance claims Substantial payment card user and Government finesWe’ve partnered with Semafone to offer a flexible and costeffective telephony solution to ensure your organisationremains compliant when taking Cardholder Not Present (CNP)payments over the phone. Combining our market leadingGamma SIP Trunks with Semafone’s award winning solutionprotects your business from risk.It’s quick to install, helps to improve agent productivity byreducing average handling times and supports connections r

Taking the worryout of SIP migrationHow good is call quality?From the moment we connect your SIP trunking service, youwill enjoy all the reliability, resilience and quality that comesfrom working with the UK’s leading SIP trunk provider. Weproactively monitor and manage quality of service across ourentire network – it’s the underlying network quality that makesa real difference to SIP trunking. As a consequence we are ableto support both G.729 and G.711 codecs.What if we lose internet or power?What if we want to move offices?Number flexibility with SIP trunking means that you can keepyour existing number, even when moving out of the area whilstmaintaining the perception that you still have a presence inthe area you’ve moved from. We can easily transfer your old orexisting numbers too so that you can avoid expensive remotecall forwarding or call diversion charges. With CLI flexibility youcan also decide which number you want to display on a call bycall basis – great for contact centres.Is SIP resilient?SIP trunking is now a mature service enjoyed by thousands ofUK organisations and this alone is testimony to the reliabilityof SIP. For added reassurance while you switch to us, SIPtrunking can even be used with existing ISDN connections toensure the transition goes smoothly. Owning our own nationalnetwork means we can identify and fix issues faster, throughour advanced monitoring and diagnostic tools.BUSINESSBENEFITSShould the unthinkable happen, you can use SIP trunking tominimise disruption to your business. For example, if yourLondon branch has to close in an emergency, and you needthe calls routed to Manchester immediately, Gamma SIPTrunks can do this and at no extra charge to you.Can we add or remove some lines?SIP trunks are valuable for businesses with seasonal voicecapacity requirements where more lines can be quickly andeasily implemented with no long term commitments, forexample when running sales campaigns. Conversely, if yourbusiness has multiple sites with ISDN connections into each,using Gamma SIP Trunks you can reduce the number of ISDNconnections that your business requires and also reduce themaintenance costs on all of your various PBXs. At the remotesites you are left with just the cost of an internet connectionand the handsets that you need and you can then pull all thetelephony traffic back into your centralised PBX.GAMMASIP TRUNKSSave up to 50% on line rentalsand 25% on calls.Expensive.FLEXIBILITYAdd lines, take them away.Split calls - your in control.Can’t do flexible, sorry.CONTROLMake changes instantly.Choose how and where youwant calls delivered.Changes can take months;at the mercy of suppliers.FUTUREWell mapped out and readyfor voice/data convergence.Going nowhere fast.Gone by 2025.Handles emergemcieswith ease. Re-route calls tobackup sites in seconds.Hope nothing bad SDN

Business solutionsHelping your business thrive, with built-in protectionNumber flexibilityGamma SIP Trunks support business relocations by enablinga geographic number to be retained without call forwardingcosts. This ensures business continuity and reduces thecosts of having to change company stationery, listings andadvertisements. As a leading UK communications providerwe can also supply out-of-area geographic number ranges tomake your organisation appear local, even without a physicalpresence.Business ContinuityBusinesses of all sizes need a business continuity plan fortelephony. Combine our SIP trunks with our Inbound serviceand your callers will always get through. Set automated callplans or simply divert published numbers to backup locationsor mobile devices – instantly and from anywhere.Affordable resilienceBusiness-grade voice and internetconvergenceWith our SIP trunks delivered over Gamma Broadband orGamma Ethernet, you can have a high-quality voice and dataservice from just one connection, making for significant costsavings.Line and PBX estate rationalisationFor businesses with several locations, our SIP trunking serviceprovides ISDN line rationalisation; the ideal way to reduce thenumber of PBXs requiring maintenance.If you’ve ever had to deal with a service outage you’ll knowthat speed of response is key. Our active/standby and loadsharing designs are engineered to cope with any situation tomaintain telephony uptime. Whether you need to keep yourbusinesses running in an emergency without the high costof call forwarding or simply need to balance call loadingsbetween sites during peaks, Gamma SIP Trunks will provide abusiness grade solution.Phone hacking and misuse protectionHacking and abuse of business telephony is becoming as bigas credit card fraud. With this type of abuse, the cost of thecalls falls to your business. But with our CallGuard service allof your existing business numbers are protected from suchactivity. Your calls protected from usual usage Avoid unwanted, expensive billsFree UK callsOur SIP trunking service provides free call termination to UKfixed destinations, including 01, 02 and 03 number ranges. Italso provides free calls between connected sites, includinginternational locations. Tailor your protection - opt numbers in and out Peace of mind

Flexible SIP TrunksSolving real business issuesWith Gamma SIP Trunks you get a service that is more robust and cost-effective than ISDN. Because SIP trunking is an internetbased telephony service, you also get number flexibility, which gives you a whole host of other added benefits that can solve realbusiness issues. Here are just some of the ways that Gamma SIP Trunks can enhance your business:Business ContinuityUse Gamma SIP Trunks to protect your office environment in case of fire, flood or other natural disaster.For example, if your London branch has to close in an emergency and you need calls routed to Manchesterimmediately, Gamma SIP Trunks can do this and at no extra charge to you. Set up at your new location isquick and easy and there are no call-forwarding costs for each inbound call.Your premisesLondonFlooding inLondonDSL, directinternet or EthernetconnectionPSTNGamma SIP TrunksAlternative premisesManchesterDisaster Recovery andservice resilienceBy having two PBXs, each at a separate site and eachwith its own connection, you will always have serviceavailability. Should one site go down, your inboundand outbound calls can automatically be reroutedto the second site in an instant and without anyprohibitive call-forwarding charges. With this set-up,you can also share the load on inbound calls to two ormore sites. You may choose to have your second PBXoff-site at a colocation centre, thereby avoiding thefull cost of a second PBX. Alternatively you may wishto use your existing ISDN line as a back up.For absolute resilience Gamma SIP Trunks can becombined with our Inbound service. In the unlikelyevent that all of your SIP trunking services areunavailable, you can still instantly reroute yourinbound calls to any destination by redirecting themto your number of choice.Gamma SIP TrunksLondonSite APBXPBXGammaInboundManchesterSite BPBXISDN 30

Multi-siterationalisationBeforeIf your business has multiple sites or if you have anISDN connection into an individual PBX at each site,using SIP trunks can reduce the number of ISDNconnections that your business requires and can alsoreduce the maintenance costs on all of your variousPBXs. At remote sites you are left with just the costof an internet connection and the handsets that youneed. You can then pull all the telephony traffic backinto your cloud-based PBX.PBXGlassgow - 30 Channels0141 000 000PBXManchester - 60 Channels0161 000 000ISDNYou can also benefit from increased resilienceby building an automatic failover system intoyour communications strategy for lines and callsshould your main site go down. With SIP trunksyou can instantly centralise and distribute the callssomewhere else, to another site or to homeworkers,for example.PBXBirmingham - 30 Channels0121 000 000PBXLondon - 30 Channels0207 000 000RationalisationSeasonalityGamma SIP Trunks are valuable for businesses withseasonal voice capacity requirements where morelines need to be quickly and easily implementedwith no long-term commitments, for example whenrunning sales campaigns or during major events.Unlike ISDN, SIP is a highly cost-effective systemthat can be scaled up and down according to therequirement, enabling more effective use of IT teamresources by making the provisioning of new userswith voice and data systems quick and easy.After100 ChannelsIP Network0141 000 0000161 000 0000121 000 0000207 000 000Gamma SIP TrunksCentralisedPBXsBusiness relocationNumber flexibility with Gamma SIP Trunks meansthat you can keep your existing number, even whenmoving out of the area, saving you costs on printedcompany literature and stationery whilst maintainingthe perception that you still have a presence in thearea you’ve moved from. We can easily transfer yourold or existing numbers to Gamma SIP Trunks so thatyou can avoid expensive Remote Call Forwarding(RCF) or call diversion charges.02070161

SIP Trunk Call ManagerFor cloud-based call controlSIP Trunk Call Manager offers apowerful business continuity solution,giving you the ability to consolidate allyour numbers onto a single platformand never miss a call.Cloud-based call control allows you to automatically directcalls to a destination you define such as a colleague, mobile,hunt group or call queue. Combined with all the features andbenefits of Gamma SIP Trunks, including our call bundles andthe only fraud management tool that protects you and yourcustomers by enabling them to set spend limits, SIP Trunk CallManager is a hugely powerful business tool.Powerful business featuresSIP Trunk Call Manager comes with a portfolio of businessfeatures which, when combined with the ability for the user tofully control the service via a mobile app, provides a powerfulbusiness solution.Delivering added valueSIP Trunk Call Manager takes SIP beyond a connectivityservice with additional business features, applications anduser-led control to bring additional value to the business. Enhanced SIP service - gives you full and direct control ofyour inbound LQUEUEINGDESTINATION/PASSTHROUGHDIVERT(ON BUSY, NOREPLY, FAILURE)DAY AND TIMEOF DAYROUTINGDATEROUTINGIVRVOICE MAILNOTIFICATIONSHORTCUT Tailored business continuity- never miss a call Accelerate ISDN conversion - why buy a simple SIPtrunk when you can have so much more No number translation - 01, 02, 03 and 08 termination onsubscribed Gamma SIP Trunks Easy management - mobile app and web portalDROP SHADOW VERSION

SIP trunking is rapidly replacing ISDN services for inbound and outbound voice calls. Gamma is the UK's leading SIP trunks provider. Our SIP trunks connect your site's PBX directly into the Gamma network via an internet connection to carry and terminate your calls across the public telephone network.