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Telcl industry lingo terms I looked up (posting in case this will be helpful to others): DID: Direct Inward Dialing is a method organizations use to route inco

Telcl industry lingo terms I looked up (posting in case this will be helpful to others): DID: Direct Inward Dialing is a method organizations use to route incoming calls to specific private branch exchange (PBX) systems without an operator. Organizations purchase DID numbers from a telephone company or service provider and assign them to individual extensions within the organization. TN: Telephone Number, this initialism is interchangeable with DID. DLC: Installations using Digital Loop Carriers connect analog phone lines of individual users into a single signal sent on single lines to the central office of a phone company. The combined signal is separated into original signals at the central office.

troydavis 4y ago
Thank you! One correction - 10DLC is 10-Digit Long Codes. Sometimes this is called “Application-to-Person” (A2P), in contrast to "Person-to-Person" (real people typing on our phones or equivalent). A 10DLC A2P SMS is an SMS sent from a 10-digit number and triggered by API (or anything else automated). Maybe the SMS is your doctor’s appointment confirmation system or an online retailer telling you your order has shipped… or maybe it’s a spammer. If it comes from a 10-digit phone number instead of a 5-6 digit short code, that’s 10DLC. In the last year or so, a registry for 10DLC A2P numbers has emerged (https://www.twilio.com/docs/sms/a2p-10dlc https://www.twilio.com/docs/sms/a2p-10dlc, https://support.bandwidth.com/hc/en-us/articles/4423826434583-10DLC-FAQ https://support.bandwidth.com/hc/en-us/articles/442382643458...), but adoption is mixed, enforcement is low, and end consumers/recipients don’t see any of it. There’s also “Person-to-Person” (P2P) 10-digit SMS, like you texting a friend. Those can also be used to spam (hook up a computer to a consumer SIM), but it’s much less common, especially in the US. Most US-originating SMS spam comes from 10DLC A2P numbers.

troydavis 4y ago

Thank you! One correction - 10DLC is 10-Digit Long Codes. Sometimes this is called “Application-to-Person” (A2P), in contrast to "Person-to-Person" (real people typing on our phones or equivalent). A 10DLC A2P SMS is an SMS sent from a 10-digit number and triggered by API (or anything else automated). Maybe the SMS is your doctor’s appointment confirmation system or an online retailer telling you your order has shipped… or maybe it’s a spammer. If it comes from a 10-digit phone number instead of a 5-6 digit short code, that’s 10DLC. In the last year or so, a registry for 10DLC A2P numbers has emerged (https://www.twilio.com/docs/sms/a2p-10dlc https://www.twilio.com/docs/sms/a2p-10dlc, https://support.bandwidth.com/hc/en-us/articles/4423826434583-10DLC-FAQ https://support.bandwidth.com/hc/en-us/articles/442382643458...), but adoption is mixed, enforcement is low, and end consumers/recipients don’t see any of it. There’s also “Person-to-Person” (P2P) 10-digit SMS, like you texting a friend. Those can also be used to spam (hook up a computer to a consumer SIM), but it’s much less common, especially in the US. Most US-originating SMS spam comes from 10DLC A2P numbers.