GSM Modem Load balancing

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Shiby Varghese
New member
Username: Shiby

Post Number: 20
Registered: 01-2007
Posted on Wednesday, October 03, 2007 - 09:35 am:   

HI,
If i connect 5 GSM modems to nowSMS. then,
1. How i can load balance these modems so that messages in the queue goes to the free modem only.
2. How can I send message through a specific modem among these five modems.

Your advice will be highly appreciated.

Thanks
Shiby
Bryce Norwood - NowSMS Support
Board Administrator
Username: Bryce

Post Number: 7509
Registered: 10-2002
Posted on Wednesday, October 03, 2007 - 04:03 pm:   

Hi Shiby,

1. By default, they are load balanced. Messages will be sent out over all of the modems simultaneously.

2. If you need control over routing to particular SMSC connections, the logic in NowSMS works like this:

When NowSMS routes a message, it first looks to see if a sender address has been specified for the message submission (normally there is not a sender address specified, unless you submitted the message via HTTP and specified a "Sender=" parameter). If a sender address was specified, then NowSMS checks to see if the sender address matches the "Default Sender Address" that is configured for any of the SMSC links (or the "Phone Number" field if the SMSC connection is a GSM modem). If NowSMS finds a match, then it will route the message only via an SMSC connection with a matching sender address.

If NowSMS did not find a match on the sender address, then it evaluates the recipient address, and it will look to see if it finds a match in the "Preferred SMSC Connection for" recipient address masks associated with any
of the SMSC connections. (These recipient address masks can be wildcards such as "+44*" to match any phone number that starts with "+44".) If NowSMS finds a match, then it looks for the longest mask that provides a match, and routes the message via the connection with the longest matching mask. (For example, if you were sending to +441624999999, and you had one connection with a mask of "+44*", and another with "+441624*", then the connection with the mask of "+441624*" would be used as it is a longer match than "+44*".)

If there is no match on the recipient address mask, then the message will be routed via any connection that has "Support any outbound message traffic" checked.

(Note: It should also be mentioned that if NowSMS found multiple matches on the sender address, it evaluates the "Preferred SMSC Connection for" recipient address masks for each of the connections that had a sender address match.)

In addition to the above, there is a special HTTP parameter setting that can be used to explicitly route a message via a particular SMSC, so that you don't have to use the sender/recipient matching logic if it is not appropriate for your configuration.

It works like this, when you submit a message via HTTP, the HTTP interface now supports "&SMSCRoute=xxxxx", where the value of this setting can be the name of a defined SMSC (e.g., "Bluetooth Modem" or "SMPP - a.b.c.d:xyz"). Or, rather than using the SMSC name, it can be a route name that is defined as associated with an SMSC. To define a route name for an SMSC, it is necessary to manually edit SMSGW.INI, and under the appropriate section header (e.g., [Modem - Bluetooth Modem] or [SMPP - a.b.c.d:xyz]), add RouteName=xxxxx. It is possible for multiple SMSCs to share the same route name, meaning that if a message is submitted with "&SMSCRoute=xxxxx", it will be routed outbound over the first available SMSC that is configured with RouteName=xxxxx.

-bn

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