- T.38 Real Time Fax Service
T.38 Real Time Fax Service
What is T.38 Real-time Fax?T.38 (FoIP) uses the Internet as a conduit; there is a direct connection between the sending and the receiving fax server or fax devices exactly as with the PSTN. The ‘fax server’ at the service provider is eliminated.
What is T.30 and T.38 fax?These are protocols that implement the real-time fax transmission. The T.30 protocol is used when the network connection carries analog signals as in PSTN or VoIP calls. The T.38 protocol is used when the network connection carries digital signals as in FoIP calls. T.38 encapsulates T.30, stripped of its analog considerations.
When the direct connection is secure, there can be no false confirmation that the fax was sent and no case for the receiver to deny it was correctly received at a given date and time.
What is hardcopy-fax?It is the classic method, where the sending and receiving devices are fax machines or MFDs (multi-function devices). Traditionally this method uses PSTN lines but with a line adapter that connects to a qualified T.38 service provider, faxes can go over the internet from the fax machine or MFD.
What are SMTP-fax and HTTPS-fax?These are different methods of faxing, having a storage component, but ultimately the sending and receiving device have to engage in a real-time fax call.
SMTP (an email transport) is used to email a document to a fax server which then ‘faxes’ it to a recipient. In the reverse direction, an incoming fax is received by the fax server and emailed to the recipient as an email attachment. Referred to as ‘Desktop Fax’, this method is a very important component of contemporary faxing.
HTTPS (a web transport) is another way to submit a document to or from a sending or receiving device. It involves an HTTPS Client that transfers the document to and from an HTTPS Server that manages the actual faxing process.
HTTPS Clients are proprietary and typically exist as add-ons to fax servers or in analog telephone adapters that connect the fax machine through the Internet.
You will note from the previous diagrams that HTTPS and SMTP faxing require specialized fax servers at the Service Provider. These SMTP and HTTPS specialized servers incorporate a ‘Gateway’ component responsible for setting up the fax call via the Telephony Switch and faxing the document in real-time using T.30 or T.38.
What is so important about real-time fax?Two components in the above definition are of particular significance in comparison to email or other types of communications.
a. Page-by-page confirmation means that sender does not proceed with sending further pages if something goes wrong therefore:
- If something goes wrong, sender knows exactly at which page the transmission stopped.
- Receiver cannot claim they did not receive a confirmed page.
b. Real-time direct connection between sending device and receiving device means:
- There is no middle man that can alter the content of the fax in transit.
- Sender and receiver know and can agree on the delivery time.
- Desktop Fax Service
Desktop Fax Service
What is babyTEL Desktop Fax service?The babyTEL Desktop Fax service is a complete fax solution allowing you to send and receive faxes as emails from your computer or mobile device. It requires no fax machine or other type of hardware making it more convenient, mobile, ecological and easy to manage.
Do I need special equipment or software?No. You only need an email client to send and receive faxes. You view your faxes using a standard PDF reader.
How reliable is the babyTEL Desktop Fax service?While most VoIP networks are optimized for voice rather than data, babyTEL’s network is designed with fax in mind and engineered from the ground up to fully support T.38, a robust standard for sending faxes across IP networks in real-time. In addition to T.38 support, babyTEL incorporates best practices for faxing to ensure optimal fax success rates. Our fax services are currently trusted by government and Fortune 10 companies that demand the highest levels of reliability. See Ensuring Quality and Reliability for a detailed technical discussion on babyTEL reliability.
How do I receive faxes?Faxes sent to your fax number are automatically received in your inbox as convenient PDF attachments. You can archive them and print them only when necessary.
How do I send faxes?To send faxes, simply send an email to <number>@fax.babytel.net, where <number> is the telephone number, including country code, of the fax you want to reach. The body of your email and any supported attachments will become the content of the fax. If you don’t specify content in the body then only the attachments will be faxed. For best results we recommend using PDF file attachments, however most Office document types are also supported.
The OBi300 Universal VoIP Adapter
Connect the OBi300 ATA to your telephony or faxing equipment and enjoy the benefits of voice or fax calling over the Internet. You must have a router to use this adapter.
- 1 phone port to connect a fax machine or a Multi-functional device (MFD)
- 1 (WAN) Ethernet connection to a broadband modem or router
- 1 USB 2.0 port
See the product Data Sheet for more details.
Fax to emailAccess your babyTEL account online to enable forwarding your messages to an email address. When enabled, if an incoming call is answered by babyTEL on your behalf, we will take a message, be it voice or fax, and deliver it to the specified email address. Depending on your service plan, fax pages received by email may incur charges.
Desktop Fax User Guide