SMPP "from number" masking

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Oliver Palmer
New member
Username: Opalmer

Post Number: 4
Registered: 12-2003
Posted on Monday, December 29, 2003 - 10:11 am:   

Dear Bryce,

I am having difficulty locating where I would put in the mobile numnber I wish messages to appear that they have originated from (called "Masking" here in Aus, not sure if it is the same in the UK) I am processing 2 way SMS messages perfectly and using a custom made application I can put any number (or name) in and when the SMS is recieved on a mobile handset this entry appears as the sender. However I cannot find a corresponding field to enter this in to in NowSMS.

The logical place would be the "Senders Address" field in the SMPP connection properties page but this doesn't appear to work. Is there a registry setting I can adjust?

Many thanks for this and I look forward to hearing your response.


Bryce Norwood - NowSMS Support
Board Administrator
Username: Bryce

Post Number: 1462
Registered: 10-2002
Posted on Wednesday, December 31, 2003 - 04:23 pm:   

Hi Oliver,

Normally you would put this into the "Sender Address" field when you define the SMPP connection.

If "Allow Sender Address Override" is NOT checked then the "Sender Address" specified on this page will always be used.

If "Allow Sender Address Override" is checked, then you can override this default sender address by including a "&Sender=xxxx" parameter in your request. (If using 2-way SMS, you have to do a redirect response.)

So I suspect that you're doing everything right. What is the sender address that you are seeing?

The only thing I can figure is if the service provider has this hard coded for your account. Or if you are using a GSM modem, it is not possible to override the sender address.

I suppose the thing to do would be to put NowSMS into debug mode (manually edit SMSGW.INI, and add Debug=Yes under the [SMSGW] section header, then restart the service). And then we could look at SMPPDEBUG.LOG to see in the raw SMPP packet what address is being included as the sender. But I can see no reason for the sender address to be anything other than the "Sender Address" configured for the SMPP connection or the one specified in the "&Sender=xxxx" parameter.


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