JTECH Communications Inc. SERVALERT200 Manuel D’Utilisation

 

POCSAG pagers must receive a special seven-digit “address” to let it know that 
the message that follows is for this particular pager. Since thousands of pagers 
will share a common frequency, a method must exist that allows a single pager 
among these thousands to respond and all others to remain silent. A system of 
addresses has been developed that allows all pagers on a common frequency to 
hear all pages, but only the individual pager whose address was sent to actually 
signal and display the message. This “Address” is referred to as Cap Code. A 
Cap Code is the actual seven-digit number that must be received by a POCSAG 
pager to have the pager receive a message.  

Pager Number often refers to the one to four digit number placed on a pager label. In 
systems that support cross reference tables, the Pager Number may only be the 
number on the label of the pager and only serve as a cross-reference to its actual Cap 
Code. For example, to simplify use by an end user, you might label a pager with a 
phone extension of #002, and your computer software may associate pager #002 with 
cap code 0000016. 

Numeric pagers sold by JTECH are capable of displaying 1 to 16-digits. A 
numeric pager will not display an alpha message. When this class of pager is 
targeted to receive a page it must receive a numeric only radio transmission.  If a 
numeric only pager receives an alphanumeric transmission sent to its cap code it 
will attempt to decode the message and will then display ‘garbage’ on the 
screen.  Numeric only pagers are not ‘smart’ enough to know not to attempt to 
display alpha data.  Therefore the software sending the transmission must be 
smart enough not to send alphanumeric data to numeric only pagers. 

Alphanumeric pagers are capable of up to 120 alpha or numeric characters. 
Most will display an alpha message as well as a numeric message. When this 
class of pager is targeted to receive a page, it may receive either numeric only or 
alphanumeric data and if the pager is properly set up, it will display either type of 
data properly.  Alphanumeric pagers require special set up and adherence to 
special transmission rules to properly display both alpha and numeric only radio 
transmissions. 

Many pagers are able to have multiple cap codes which are useful for group 
paging. The number of cap codes for pagers varies depending on the 
manufacturer and model.