VOIP Service Providers T.38

This page serves to maintain a list of VoIP providers who offer T.38 origination/termination.

Confirmed

Do not add a provider to this list unless the provider explicitly advertises support for T.38 on their website (not just “fax support”). Please be aware that many providers which do not support T.38 will nonetheless list “T.38 support” as one of the features of the ATA’s they sell. This does not count, and these providers do not belong on this list.

handSIP T.38 Fax SIP Trunking
handSIP T.38 Fax SIP Trunking provides reliable, affordable FoIP origination and termination.

• Metered plans offer low per-minute rates for inbound and outbound
• Unlimited plans offer unlimited inbound and low per-minute rates for outbound
• Toll-Free minute blocks available
• Local and Toll-Free DIDs
• Port existing fax numbers

• T.38 Fax 100% T.38 SIP origination and termination. Power-T.38 plan – Per minute rates with local and toll-free DIDs. Power-T.38 Ultra – Unlimited inbound and metered outbound.
• Alcazar Networks Inc. is offering Wholesale Origination / Termination / Free Toll Free Termination – Get paid for your toll free traffic! We provide high quality, dependable access to over 3100 rate centers and instant access to over 1,200,000 DIDs including T38 capability on 100% of our DIDs, CNAM, e911, and local number portability. Wholesale SIP
• babyTEL – babyTEL is the world leader in T.38 Trunking with enterprise encryption services available.
• Conexiant Telecom – VoIP T.38 Fax Support Guaranteed T.38 support, Wholesale VoIP, USA & A-Z Term, DIDs, Toll Free, E911, Internet Fax. Direct connects with CLECs.
• Endstream Communications – inbound faxes are delivered directly to your email. Website does not specifically say T.38 support.
• FaxDigits – Free personalised US FAX number in Iowa State. Fax to email attachment service in pdf format. Unlimited incoming number of faxes. VOIP T.38 codec enabled for internet faxing reception. ** as of 4/2011, web site does not load.
• Flowroute Inc. High-performance SIP trunking that delivers unparalleled control of, and support for, the communications that power your business. Wholesale VoIP, A-Z SIP Termination, Cheap DIDs, Free CNAM Storage, E911, T.38 Fax support, SIP-TCP support, Redundant servers, Graph Statistics and great interface.
• GoTo Hosted PBX – GoTo specializes in Hosted PBX and SIP Trunking solutions. They can customize a solution that meets the needs of any size business, from small to medium size businesses to contact centers and enterprises with multiple office locations. All their products support T.38 faxing.
• Global Crossing Enterprise VoIP Services support T.38 – Medium to large businesses.
• Intertel Full Confirmed T.38 support. Australian based provider, SIP, DID, 1300/1800 support, configuration and consultation.
• Interec Full T.38 support. SIP/H323 Cisco based. G729, G723, G711 SPAIN
• Logic Voice -The NEW Revolution in Voice Communications. Logic Voice provides leading voice, data, converged, and managed phone system for businesses and enterprises who need a proven, responsive, and cost-effective alternative to the phone company monopolies. US48 & Canada Termination only 0.6 cents per minute. Unlimited Inbound Local DIDs for only $0.99 per month. Toll free service for only 0.9 cents per minute
• Nxgen Networks – Utilizing the T.38 standard and leveraging https, faxes are sent reliably, securely traversing company firewalls and NAT (network address translation). Nxgen’s solution sends faxes reliably over any IP connection including 3/4G cellular, satellite, DSL, cable. Tight integrations with Windows applications allow for paperless faxing solutions as well as connections for legacy fax machines using Audiocodes 202B ATAs.
• OMEGA Telecom(Cyprus) – Premium Quality Worldwide Termination with CLI and T.38 fax support. T.38 Fax DID numbers origination and Fax2Email (T.38 and G.711) Service.
• onecentral(Netherlands) Corporate Voice and Fax service provider. Several T.38 based services, including soft-client.
• MondoTalk – World wide T.38 support. Inbound and Outbound. Clear quality, Low rates. Call plans for many countries including untimed calls for Australia. No access fees, No contracts, No cancellation fees, No flag falls and No Connection fees. Too many features to mention here.
• MK Netzdienste GmbH & Co. KG – (Germany) Business SIP-Trunking with DID, T.38 Support, Centrex-PBX Business-Solution
• NumberGroup – Fax to Email as well as many other inbound services, T.38 and PCM support with PDF delivery via email. Free numbers.
• T38Fax.com . T38Fax – 100% T.38 SIP origination and termination. Power-T.38 service provides consistent, reliable T.38 with unlimited support from fax industry veterans. Simple, usage-based pricing with local and toll-free DIDs.
• Telecomservice (Austria) SIP/IAX2 provider, Austrian geo-numbers, PBX services, T38-Fax, PRI and BRI interface for existing PBX integration
• NETWORTH TELECOM (France) – Networth Telecom is supporting T.38 fax outbound and inbound.
• Transcom VOIP is a Global voip transit network that supports true T.38 by default for fax, (or G711 if that isn’t suitable) PAYG if required, updated website and fast track, multiple route grading
• VCCS Telecom – T.38 Fax Support including Fax2Email for IP-PBX based systems and ATA devices. VCCS is an SMB VoIP solutions provider based in Canada
• VoiceMeUp Offering the largest Canadian DID coverage, best for business usage, channel aggregation offered. T.38 Fax Support including Fax2Email for IP-PBX based systems and ATA devices.
• Siptize – VoIP termination with T.38 with special prices. WebFax, Spain DID numbers.
• MyOwnTelco – (Canada) Small Business VoIP system with unlimited calls in Canada and USA, Video Conference, Fax, IVR and 10 extensions.
• Voyced | Voyced is a VoIP (telephone) solution provider with the ambition to grow to becoming one of the main pan-European players with our low-cost, commercial grade IPPBX and VoIP services. We are already present in over a 150+ countries with Standard, Call Center, TollFree and /or UIFN telephone number / DIDs for residential and business users and expanding further. You can make phone calls to anywhere in the world without any extra crossing country border costs as all our clients get the same tariff, no matter where they are located. Quality and flexibility are always most important and now you can have that, wherever you are and for the lowest cost ever. Let us help you and get in touch now! In the end, it boils down to the fact that we supply any business with an award-winning, commercial grade VoIP solution. A telephony solution that would normally only be available to the big corporations and for a far lower price then you would think possible.

The following providers offer T.38, but only at the wholesale level (they will not sell to retail customers and do not post pricing):

• VoIP Innovations Our North American wholesale Origination and Termination VoIP suite offers a reliable and cost effective way to offer a T38 fax solution. Choose from nearly 8,500 rate centers/POPs and over 110,000 DIDs.

Note: The “linkable confirmed experience” criteria was removed since many providers who offer T.38 but do not advertise it (such as BroadVox) change their level of support over time.

Alternatives

• FaxLogic Hosted Internet Fax Solutions for FoIP/VoIP A highly-reliable hybrid and modular solution, purpose-built to support fax in Voice-over-IP environments. Hybrid in that FaxLogic uses T.38 on the IP path between the customer site and FaxLogic’s data centers, then converts once to TDM for the path to/from the receiving/sending fax. Modular in that FaxLogic is available to VoIP service providers as basic “IP fax dial-tone”, IP fax dial-tone plus virtual fax (fax-to-email, email-to-fax, web fax portal, etc.), and as a full-featured cloud-based fax server, capable of replacing premise-base servers and appliances.
• ZCarrier Inc. ZCarrier Full T.38 support. SIP/H323, Wholesale VoIP Provider

Crippled

• Packet8 (United States) – Packet8 now supports T.38 faxing service, although only with the provider-supplied ATA device (“The Packet8 fax plans are currently only available to Packet8 existing customers who purchase a new BPA410 phone adapter for Fax Extension”).
• BroadVox Direct (residential offering, no longer offered) has T.38 support which was once reported to work with t38modem, but will no longer work with new accounts. You need a cryptographic credential which is entombed in the ATA they ship you, and the company is quite stubborn about never releasing that credential to the customer. So, basically, it’s only T.38 if you use their ATA, and they’re doing their darndest to use crypto to keep it that way.

Rumored

If you can provide a link to the provider’s website indicating T.38 support for any of these entries, move it to the first list and link the evidence. If you can disconfirm, move them to the next list and include the date tested. Providers who claim that T.38 is coming “real soon now” should be disconfirmed due to the fact that almost all of those who make this claim remain in this state indefinitely.

• Iristel website indicates that their adapters include T.38 support, but does not state that the service actually includes it. 100% Canadian Telephone Company. Unlimited Extended plan from $15.95. Iristel seamlessly bridges the gap between IP networks and the PSTN. Iristel’s VoIP solution is ideal for Calling Card, VoIP carriers, CLEC’s, Asterisk owners and virtual carriers requiring local service within Canada. Iristel also offers virtual T.38 faxing solutions both inbound & outbound.
• Trans National Communications International – We do and have interop tested T.38 fax support over SIP. We do not (to the best of my knowledge) confirm this on the site. I am part of the Tier III Engineering group, and I can tell you that it is functional. One potentially important note, we are a telecom wholesaler working through a reseller agent network. We do not do any direct retail sales. We also provide only business telecom services, no individual.
• NodePhone An ISP that also provides phone services. Does not specifically state T.38 (or SIP for that matter) support. (Australia)
• ContactTel Inbound DID’s 100% T38 ,Pay as you go , or 9.95 monthly plan ** 4/2011 – update: offers Fax2pdf support. Does not mention T.38.

Disconfirmed

• TelIAX
• IAXTel
• IP Communications United States – National DID numbers, T.38 said to be included in basic plans. Working at one time, but as of April 2010, does not work at all. Any T.38 negotiation attempt returns “488 Not acceptable here.”

Wanted

• Providers offering both IAX-voice and T.38 (ie T.38 over SIP or H.323 — not necessarily over IAX)
• Telecomservice (Austria) SIP/IAX2 provider, Austrian geo-numbers, PBX services, T38-Fax, PRI and BRI interface for existing PBX integration
• Pay-As-You-Go providers with T.38 . T.38 Fax and babyTEL