A2P 10DLC Registration Campaign (Use Case) Types
The tables below show Campaign Types that have become available since the new A2P 10DLC registration was launched for AT&T in the US on April 1, 2021....
Messaging
Messaging
Messaging features and guides
37 articles in this category
Articles in this category
Can Canadian and US phone numbers receive international SMS messages?
Whether Canada or US phone numbers (+1 country code) can receive incoming SMS messages from international phone numbers outside of Canada and US is en...
Can I send or receive SMS with a Telair toll-free phone number?
Yes. Telair toll-free numbers support two-way SMS (sending and receiving text messages) within Canada and US, and one-way SMS to other countries. Plea...
Can I send and receive MMS on my toll-free phone number?
Yes, as of February 2021, all Canada/US toll-free numbers purchased through Telair can send/receive MMS messages to and from end users in Canada and U...
Can I send SMS messages to roaming phone numbers?
Telair cannot guarantee the deliverability of SMS messaging to roaming phone numbers. If you send an SMS message to a phone number roaming in an area ...
Can I use Telair SMS messaging for emergency purposes?
No, you should not rely on Telair’s programmable SMS during emergency situations. SMS communications to emergency services are disabled by default. In...
Can my SMS messages arrive in order?
Telair cannot guarantee that SMS messages sent from your Telair phone number will arrive in order. While we will send the SMS messages you pass to us ...
Can my SMS Messages or Phone Numbers be Blocked as Spam?
Yes. Recipient wireless carriers always reserve the right to filter out incoming SMS and MMS messages from certain numbers. They routinely do this to ...
Can Telair numbers receive SMS from a short code?
By default, Telair long code numbers cannot receive messages from short code numbers. Upon request, Telair can enable your account(s) to receive incom...
Can Telair SMS send and receive emoji?
Telair will do the best we can to ensure that the emoji in your message is delivered to your mobile carrier. However, since emoji support has not been...
Carrier support for PDF files sent using Telair MMS
Telair MMS messaging is a popular way to send media files, especially images, to end users in Canada and US. Please note that PDF files are currently ...
Delivery order of multiple media files via MMS
Multiple media files can be sent as part of one MMS message. However, Telair cannot guarantee that the messages will be received in the same order tha...
Does Telair check if phone numbers can receive SMS?
Telair API has basic phone number validation logic built into it. We try to save you money by rejecting messages to numbers we are certain are incorre...
Does the recipient of my Telair message get charged?
Telair will only charge your Telair account for sending messages through our API. We will not charge the recipient of your message for receiving a Tel...
Does Telair support concatenated SMS messages?
Messages over 160 characters are concatenated or broken up into multiple messages and transmitted separately. Telair allows you to send and receive co...
Forbidden message categories for toll-free SMS and MMS in Canada and US
The following messaging use cases are not allowed on toll-free SMS or MMS in Canada and US. If a user tries to assign an outbound message with this ca...
Handling Deactivated Phone Numbers
This article describes best practices that should be followed while dealing with deactivated phone numbers, including how to find out if a phone numbe...
How do I register my business under the new A2P 10DLC regulations?
A2P 10DLC refers to a system that allows businesses to send Application-to-Person (A2P) type messaging via standard 10-digit long code (10DLC) phone n...
How do Trust Scores for A2P 10DLC in the US affect Message Throughput?
According to the new A2P 10DLC regulation in the US, your message throughput will now be determined by your Trust Score and your Campaign type. SMS me...
How to use toll-free phone numbers for SMS and MMS in Canada
Toll-free numbers are designated for business messaging use by most major mobile carriers in Canada (Rogers, Fido, Telus and Videotron) and by all maj...
Is MMS supported for all carriers in Canada and US?
Carrier support for MMS messages varies, and is dependent on the receiving carrier. Currently, Telair supports sending MMS messages from local long co...
Is there a way to block an incoming SMS on a phone number?
Unlike voice, there is no way to block specific SMS messages on a phone number. You can disable SMS completely for one phone number or numbers within ...
Opt-out keyword handling for toll-free SMS
Toll-free SMS is a great way to send messages to recipients in Canada and US. When sending Toll-Free SMS messages, it is important to remember that Op...
Sending and receiving MMS messages
You can use an MMS-enabled Telair phone number (long code) to send and receive MMS messages in Canada and US. Please note, however, that Telair does n...
Size limitations of combining text and images
If you’re sending text and images in the same SMS, the message can contain up to 10 images and 1600 characters, as long as the entire message is under...
SMS Carrier Filtering in Canada and US
This guide discusses how SMS filtering by different wireless carriers in Canada and US can affect delivery of your programmable SIPSTACK SMS messages....
Telair support for opt-out keywords
If a customer responds to a message from a Telair long code or toll-free phone number with any of the following keywords, they will be opted out from ...
What is a Message SSID?
Every message successfully created by Telair API generates a unique SSID. The SSID is a 34-character string. Messages that contain media attachments a...
What is a Messaging Short Code?
A short code is a 5 or 6-digit number that can send and receive SMS (and MMS) to and from mobile phones. Short codes are recommended for high volume a...
What is A2P 10DLC?
A2P 10DLC refers to a system that allows businesses to send Application-to-Person (A2P) type messaging via standard 10-digit long code (10DLC) phone n...
What is A2P and P2P Messaging?
Programmable SMS Text Messaging generally falls within one of two categories: A2P and P2P messaging. A2P or Application-to-person messaging, as the na...
What is CASL?
CASL (Canada's Anti-Spam Legislation) is Canadian law governing commercial electronic messages including SMS, email, and instant messages sent within, to, or from Canada.
What kind of messages are restricted on Telair SMS?
Telair provides you with a platform to send and receive SMS messages to phone numbers around the world. However, Telair may suspend your account if yo...
What MMS content types does Telair support?
You can send text, audio, video, image and application content over Telair MMS. However, whether these messages are received depends on the carrier an...
Why are my MMS messages being sent as SMS text messages?
When you attempt to send an MMS message from a Telair MMS-enabled number to a recipient on a carrier that does not support MMS, Telair will convert th...
Will I be charged if Telair encounters an error when sending an SMS?
Telair will not charge you for a message if your API request returns an HTTP error, or if the message status on Telair is “failed.” Telair will charge...
Will Telair automatically resize my images for MMS messaging?
Yes, Telair will automatically resize supported images file types (.png, .gif, and .jpg) to the necessary size for delivery based on carrier specifica...