Connection and termination points By Aztech There now follows a digrammatical synopsis of the most common termination points used by British Telecom in their junction Box equipment and subs. Use this when beige boxing to avoid alerting unwitting engineers to your presence while the box is unused. TYPE1 ------ The most common in any junction box,offers connection for three wires. Physical contact is established when the casing is closed,snapping shut the sharpened contacts or pinnules onto the wires,and establishing a circuit. The Basic shape is thus: 1 2 3 ! ! ! !=Wires [!-!-!] #=Contact Bar |! ! !| / ! ! ! \ | ! ! ! | <--Flexi-plastic casing |#########| \_______/ Once the module is snapped shut,it can never really be opened again without destroying the connection,as the contact bar is fixed to one panel of the inside of the point and the wires the other.Jewellers screwdrivers can be used to prise it open,but this can tend to be very messy.Looking down on the point,with the smooth hood facing Toward you,usually only wires 1 and 2 are used for a standard cable.Number 3 may be used for signal/voltage splitting.Try and stick to two wire joins,because your box may drain what little voltage there is in the three wire joints to an unacceptable level. TYPE 2 ------- 1 2 3 ! ! ! [!-!-!] |! ! !| Code as Before |! ! !| /-!-!-!-\ | /!-!-!\ | ||#######|| | \__A__/ | \_______/ |___| This one is usually easier to dismantle than one,as it is hammered shut with a heavy circular implement which also forces the wires into their pinulles within the contact bar.To open,simply lever out the part marked 'A' in the diagram,and pull the wires until you obtain enough length to connect.The great thing about this terminator is that you can shut it again without leaving any evidence to suggest you were even there,neatly clipping the wires to their former state when finshed.However,the point does contain anchoring fluid,a sticky clear gel which drys on contact with air to provide a firm wire crimp at the exit point.Keep a damp cloth handy to prevent this gunk from drying up and destroying all your neat work. TYPE 3 ------- 1 2 3 ! ! ! _!_!_!_ |@@@@@| Code as before |@@@@@| except '@' indicating solid copper. |@@@@@| |#####| |@@@@@| \_____/ Impossible to open without destroying the point itself.Either strip the wires while retaining a closed circuit to expose the copper,or forget about it altogether. Type 4 ------- | | | | | / \ | | |_| This is just used as snap connection or null carrier.Absolutely useless. TYPE 5 ------- __________ | I/O |____|-| Probe -----------[ |----| | |__________| |-| A beige protection module used specifically as a spark protector in most rack mounted equipment,to avoid voltage spikes and peaks.Remove these,and the next big electrical storm that arrives your way will fuck up anything not protected.Also used as voltage barriers for test sets on high tension lines.Steal a few,as these will prolong the working life of your beige box considerably in a hostile electrical enviroment. TYPE 6 ______ |Contact A | ...=Soldered |-----\ Fuse link |.....| /Spring link | | / |-----|/ | | Contact B (Shown Open) The Blowible link fuse is a wide ranged fuse that can be in any application and any current.All the user does is solder in the type of fuse wire he wants when the link is shut.Upon blowing,the fuse will flip the link open by 35 degrees.This can be particularly useful when used in banks,as when one blows,its link strikes the contact beside it,carrying on the signal and staying off for only a fraction of a second,and increasing the fuse rating. Decide for yourself what you think you could use it for. ---=[AZTECH]=---