123456789*0# seems to initiate a test call here in most places.
There are specific test numbers too. Usually ending in 999.
1993 - reads back the line number
1994 - enters "sirius" remote test service, ID & pin required. Tests are carried out by voice prompt menus.
Each switch also has a 199 code that will initiate an automatic line test.
You dial the code, a continious dial tone is returned. You replace the reciever it runs tests on-hook and then rings back after about 30 seconds with a continious tone if it's ok and a broken tone if it's faulty. Various fault conditions produce different tone patterns.
You can usually select various tests by dialling codes 1-0 */# at the continous tone.
depends on the exchange but they test everything relating to that line / card.
199 is reserved as numbering space for engineering / test purposes only and numbers can be of any length and can be unique to a particular concentrator, primary switch, group of switches served by a particular tandem exchange(s) or available nationally.
On the old crossbars dialling 17 initiated a similar line test but it was not interactive. The menu system described above was accessable via 17 on the digital E10B/AXE switches all through the 1980s and early 1990s too.
17 is now used as part of the voicemail numbering system.
[This message has been edited by djk (edited 09-22-2003).]
