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Дистанционное программирование пейджеров NEC

Программирование пейджеров NEC по эфиру ограничено только разрешением-запрещением соответствующих CAP-кодов.

Receiving inhibition allows any address to be protected by a command sent by the paging base station. A protect address can no longer receive message data until the address is unlocked by the release command transmitted from the base station. Once the pager has received the protect or release command, it is stored in the EEPROM so that removing the battery will not cancel the command. Please ensure that the confidentiallity of this information is maintained.

Transmission sequence

The control characters which initiate the lock and unlock conditions directly follow the pager's first address ID, and take the form of message codewords. Receiving inhibition must be set to 'YES' in the ID ROM. On some models, certain fields can be changed to suit the operators needs. Each pagers' code programmer will indicate which fields are programmable/ Please contact  me if you need future information about this.

Format

The order of transmission for receiving inhibitions is as follows:

1) SOH Start of heading
2) h Function control
3) Table 1 Inhibit control
4) Table 2 ID designation
5) Table 3 Function bits designation
6) STX Statr of test

Please refer to the tables below for the variables

TABLE 1

TABLE 2

TABLE 3

FUNCTION CODE ID DESIGNATE CODE FUNCTION BITS CODE
Inhibit h 1 Q 00 h
Cancel inhibit Q 2 SUB 01 Q
    3 # 10 SUB
    4 4 11 #
    5 CR    
    6 F    

Each of the control characters shown above can be found in the character set in CCITT international alphabet No.5 (7 bits per character) code table. The bits for each character required are sent in order, starting with bit number 1 (least significant bit)/ Characters are sent in the same order as they are to be read and are packed into message codewords.

The complete message is broken into a series of 20-bit blocks, as to fill continuous message codewords. The first bit is set to 1 which identoifies the codeword as a message codeword, and the next 19 are message bits. This is transmitted in one codeword with the required redundancy and even party bits, which should give a total 32 bits. The message may be split between one message codeword and the next.

Example

Suppose it is required to 'lock' address 2, subaddress A, then following sequence should be transmitted after the pager's individual address, applying the rules set out above

1) SOH
2) h
3) h
4) SUB
5) h
6) STX

Для NEC21 посылки могут идти на 1 или 2 адрес, за посылкой может идти какое-либо сообщение, оно будет нормально отображаться на экране.

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