hiding sms sender number

IoT Gateways Legacy FX/FXT series
1

hi,

is it possible to hide or change sender number when sending sms? so that ppl who receives smses can not disturb modem by calling that number or somethingelse?

2

If you are concerned about that, then don’t send from a modem - use a gateway service.

3

i keep in mind using gateway service but i just tried to find a way to do it by open at. i guess there is no way with open at. is there?

4

another option might be to use data-only sim-cards. if you call their number from a normal phone your call gets blocked by the operator (in my experience)

5

I don’t think it has anything to do with Open-AT - I just don’t think the networks support it?

6

In my experience (UK networks), it is still possible to send SMS to a data number.

It may well be network-specific, and there may well be providers that can offer special services to do this sort of thing…

But, as long as your device has a phone number, there is no way to prevent anyone from entering its number when sending a text - whether they do it accidentally, or in some deliberate attempt to find out if the number is “live”.
Therefore your application must be resilient to receiving “unwanted” texts…

7

hi,

i have data sim card on the modem. and when i try to call the modem from a mobile phone, i can not hear call ring tone on the phone but i can see that it is ringing on the modem. i watched that by hyperterminal. it rings 20 times and closes itself (no answer).

so if i use datasim, ppl wont realise that they are calling the modem, but actually they can call until 20 rings indication on the modem. Also i get to know that there is no way to hide number when sending sms if you dont use something like gateway,sms service.

If i send ATH command when i get RING indication from the modem, then that can be the way to keep modem not busy. I can not find any better solution yet.

8

Have you actually confirmed that officially, or are you just taking my word for it?

I only said that I think this is the case - if you have some concrete evidence, it would be useful to share it…

Also whether it is a Universal Truth, or operator-specific

9

that is my opinion. i havent confirmed that offically. I will try to contact the operator but i m hopeless. Bc operator services dont give much information or solution. They may advice to use one of their sms service. But that may cost extra.