Motorola C381P technical manual SMS Port Numbers, MessageConnectionConnector.opensms//6000

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JSR 120 – Wireless Messaging API

(MessageConnection)Connector.open("sms://:6000");

Messages received with this identifier will then be delivered to the application by this connection. A server mode connection can be used for both sending and receiving messages. A client mode connection is opened by providing a URL which points to another device. A client mode connection can only be used for sending messages.

(MessageConnection)Connector.open("sms://+441234567890

:6000");

SMS Port Numbers

When a port number is present in the address, the TP-User-Data of the SMS will contain a User-Data-Header with the application port addressing scheme information element. When the recipient address does not contain a port number, the TP-User-Data will not contain the application port addressing header. The J2ME MIDlet cannot receive this kind of message, but the SMS will be handled in the usual manner for a standard SMS to the device.

When a message identifying a port number is sent from a server type MessageConnection, the originating port number in the message is set to the port number of the MessageConnection. This allows the recipient to send a response to the message that will be received by this MessageConnection.

However, when a client type MessageConnection is used for sending a message with a port number, the originating port number is set to an implementation specific value and any possible messages received to this port number are not delivered to the MessageConnection. Please refer to the section A.4.0 and A.6.0 of the JSR 120.

When a MIDlet in server mode requests a port number (identifier) to use and it is the first MIDlet to request this identifier it will be allocated. If other applications apply for the same identifier then an IOException will be thrown when an attempt to open MessageConnection is made. If a system application is using this identifier, the MIDlet will not be allocated the identifier. The port numbers allowed for this request are restricted to SMS messages. In addition, a MIDlet is not allowed to send messages to certain restricted ports a SecurityException will be thrown if this is attempted.

JSR 120 Section A.6.0 Restricted Ports:

2805, 2923, 2948, 2949, 5502, 5503, 5508, 5511, 5512, 9200, 9201, 9202, 9203, 9207, 49996, 49999.

If you intend to use SMSC numbers then please review A.3.0 in the JSR 120 specification. The use of an SMSC would be used if the MIDlet had to determine what recipient number to use.

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