Hi, You are fairly correct in your findings. If the user guide was as detailed as you suggest, it would be ~5000 pages long and very difficult to use and maintain. Its main task is to get newcomers up and running as fast as possible, while addressing 90% of their questions. Specific in depth issues that arise once in 4 years are to be handled by the ultimate documentation in all open source projects, the code, or in user groups. Even at the size it is now, ~150 pages, newcomers prefer asking the list than to read it. Thus in effect asking contributors to rewrite it in each mail.
Now, with your questions: addr_ton and npi codes are implemented only for smpp and smasi. Other smscs do not support it. The smpp autodetect function is very straightforward and simple (./gw/smsc/smsc_smpp.c: 772): 1) It affects both source and destination addresses. 2) If first digit is "+" it is international. 3) else if it is only digits or destination address it is national. 4) else if it is source address and contains letters, it is alphanumeric. There are 6 npi and 6 ton possible values according to the GSM spec. These cannot be set by URL variables (in SMS push). BR, Nikos ----- Original Message ----- From: shaded 4 To: [email protected] Sent: Thursday, September 10, 2009 9:41 AM Subject: How kannel sets TON/NPI - international vs national numbers Hi, I knew very little about TON and NPI before, but I'm learning fast now. When we give a message to kannel to send it to a SMSC, and the destination number is a normal 10-digit raw number, kannel sends it with TON/NPI of 2/1 . (I believe TON=2 means "national number"). It appears that at least one of our SMSC's is configured in this way: When kannel gives it a message to send to the customer, this default TON of 2 works fine only as long as the destination number begins with 04 or 61 (61 being Australia, our country code). Our SMSC treats any other number as "international" and will reject the message unless we send the message with a TON of 1 ("international number"). But how do we get kannel to 'recognize' an international number and therefore set the correct TON? There is very little about TON/NPI in the user guide unless I'm missing something. A couple of ways that I could find: a) If you give kannel a destination number and explicitly prefix it with "+" (must be URL-encoded as %2B or it won't work), then kannel treats it as an 'international' number and automatically sets the TON to 1. According to http://www.kannel.org/pipermail/devel/2006-July/000067.html , this is the "only" method that kannel uses to distinguish between national and international numbers. Is that the case? So our application would have to be modified to put a "+" in front of an "international" number, before pushing it to kannel. b) In kannel's smsc configuration, the following setting could be made in order to force the TON to 1 no matter what. dest-addr-ton = 1 So for each SMSC that we connect to, we would probably have to have to have a pair of near-identical smsc configs in kannel (e.g. SMSC_BOB1 and SMSC_BOB2) - one which forces the dest TON to 1, and one normal one which acts as normal. Our application would then have to be modified to send it to the correct smsc name configured in kannel, i.e. SMSC_BOB1 or SMSC_BOB2, depending on if the number is "international". So in either case, we would have to modify our application, to "recognize" an international number before passing to kannel. Is there any way to configure kannel itself to "recognize" an international number without having to modify our application? (i.e. in our case: if the number begins with 04 or 61 then kannel sets the TON to 1, otherwise use the default TON of 2.) I can't find any way of doing this so I don't think there is a way? A couple more questions: - Is there any documentation on the algorithm kannel uses to set the TON/NPI of the destination number? One of the very few references in the user guide say that dest-addr-ton is 0 by default and dest-addr-npi is 1 by default. So if the dest-addr-ton setting was omitted from my config, I expected that kannel would always set it to 0. But it obviously doesn't because as described above, it automatically sets it to 2 (National) for a fairly normal-looking raw numbers, and to 1 for a number with a + in front (%2B). So even though it's not evident from the user's guide, kannel does follow some sort of algorithm to set the dest-addr-ton dynamically. - Are there any official websites which correctly describe all possible values for TON and NPI? E.g. I've found http://www.quintum.com/support/products/rs/sysdoc/webhelp/type_of_number_(ton).htm http://en.wikipedia.org/wiki/Numbering_plan but I'm sure I've seen more values than just these.
