用 Amazon SNS 送簡訊可以固定發送號碼了

Amazon SNS 的簡訊功能可以申請固定發送號碼了:「Amazon SNS now supports selecting the origination number when sending SMS messages」。

固定的號碼包括了短碼與長碼:「Requesting dedicated short codes for SMS messaging with Amazon SNS」、「Requesting dedicated long codes for SMS messaging with Amazon SNS」。

短碼是三到七碼,依照地區而有差異:

A short code typically contains between three and seven digits, depending on the country or region that it's based in.

要注意的是短碼的部份需要開 support case 申請,而不是直接在 web console 上操作:

Open a case with AWS Support by completing the following steps.

長碼則是有可能到 12 碼,依照不同地區的設計有所不同:

A long code (also referred to as a long virtual number, or LVN) is a standard phone number that contains up to 12 digits, depending on the country that it's based in.

不過現在長碼的部份只有美國可以用,而且有速率限制:

Support for long codes is restricted to the United States only. Sending rates for long codes are restricted to 1 message per second. This restriction is set by the telecom carriers, and isn't a limitation of Amazon SNS. If you send a large volume of messages from a long code, wireless carriers might begin to block your messages. Your applications that use Amazon SNS should limit the number of messages that they send each second.

說道 Amazon SNS 送簡訊的費用,實在不怎麼好看,量小加減用 (包在 AWS 費用裡,省人力另外跑請款的單子),量大還是要找其他家接比較划算...

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