NowSMS respond unbind massege with NAK

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SMS & MMS Technical Forum » NowSMS Support - SMS Issues (Product Support Only) » Archive through April 11, 2011 » NowSMS respond unbind massege with NAK « Previous || Next »
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Luay Kshidan
New member
Username: Luay

Post Number: 3
Registered: 01-2011
Posted on Sunday, January 30, 2011 - 08:22 pm:   

We are doing some test to optimize our SMSC with NowSMS GW, We like to know why
NowSMS is responding to the unbind with a Generic NAK then carries on using the connection regardless.
Des - NowSMS Support
Board Administrator
Username: Desosms

Post Number: 2874
Registered: 08-2008
Posted on Monday, January 31, 2011 - 09:35 pm:   

Hi Luay,

I'd need to see the request in context in order to understand. (And verify that it is properly formatted.)

But my guess is that you are using an older version of NowSMS.

Older versions of NowSMS only expected the unbind request to be sent from client to server. NowSMS would only acknowledge it and close the connection when NowSMS is the SMPP server and a client sent the unbind request.

With NowSMS acting as an SMPP client, NowSMS would send the unbind request when it wanted to terminate a session, but if it received an unbind request, it did not understand the request and responded with a generic NAK.

The SMPP specification does state that the unbind request can be sent by either a client or a server, and versions of NowSMS later than 2008.09.09 do properly support the SMPP unbind request when sent from server to client.

For older versions of NowSMS, there is no harm in the server sending an unbind request and then disconnecting even though it does not receive an unbind acknowledgment.

NowSMS Support
suzain william
New member
Username: Syed2011

Post Number: 2
Registered: 06-2010
Posted on Tuesday, February 01, 2011 - 08:16 am:   

I am using nowsms from past 6 months,, i dont get any trouble..

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