Question about SMS sending services and their integration to the site

Question

SMS

There is a sales page on the Internet. There are several "Request a callback" buttons on the page. Previously, after the visitor entered his data and submitted the form, his order was sent to the post office and, further, processed by employees. There was a need to work according to a different scheme:
It is necessary to send an SMS with the visitor's data directly to the phone of an employee of the company in order to bypass the mailbox and receive orders on the mobile.
Please briefly describe the services that can do this.

Answer 1

littlesms, for example , the
api is simple, they work quite reliably
, they even deliver to skylink, which is far from always the case in this world
. can employees buy cheap smartphones? and mail will be more convenient than sms? well and cheaper

Answer 2

Perhaps you should take advantage of the possibilities of IP-telephony - call managers during business hours, if someone picks up the phone - call the client. It is configured not so that it is too complicated + it would be necessary to introduce a check for a reverse number.
If no one answered the phone/out of business hours, we give the client "there is no one", we send mail (they won't read it before morning anyway...), or we write it down on the site in the "missed callbacks" section. with a call button.