LMOS/MLT CODES AND MEANINGS

                           assembled by Lineside



         If you didn't know, LMOS stands for Loop Maintenance Operating
system, and MLT is the mechanized Loop Test. The following are codes and
their meanings for the BellSouth LMOS.They may however be similar, the same
or totally different in other areas. Hopefully someone out there will put
these to good use.

OUTSIDE PLANT (04xx)

0400   Trouble not cleared
0401   Pair change
0402   Pair cut dead ahead
0403   Pair transposed
0407   Pair reconstructed
0408   Miscellaneous
0409   Wrong pair assigned
0410   Cable
0412   Cable damage (non-telco)
0420   Non-accessible plant
0430   Accessible plant
0431   Accessible cross box/SAC etc
0440   Wire
0450   Lightwave/ fiber cable
0461   Repeater plug-in
0462   Apparatus case
0463   RT-common equipment cicuit pack
0464   RT-POTS channel unit
0466   RT-Wiring/physical/etc
0467   RT-power
0468   Protection
0470   (DLC) Lockups and precaution measures
0480   Multi-channel and other loop electronics
0490   Air pressure systems

PUBLIC COMMUNICATION (02xx)

0200   Other station equipment standard
0210   Full money box
0220   Enclosure/support equipment
0230   Portable phone cart
0240   Coin and card set
0250   1F2 coin telephone
0260   RACTS/OMNI phone
0270   Collect call timing device (CCTD)
0280   AUGAT monitoring equipment
0290   SMART coin telephone

WIRE (03xx)

0300   Corporate com./ public wire
0340   Network interface
0350   Network terminating wire
0370   Potection
0381   Service drop wire buried/ permanent
0382   Service drop wire buried/ temporary
0383   Service drop wire buried/ cutover
0384   Service drop aerial

FOUND OK- IN (08xx)

0800   Found ok- in
0890   FOK- in for data base driven services
0891   FOK- in calling card service
0892   FOK- in automatic intercept system
0893   FOK- in Expanded 911 service (E911)
0895   FOK- in watch alert
0897   FOK- in 700 service
0898   FOK- in expanded 800 service
0899   FOK- in dial it

CAUSE CODES

100    Telephone company employee

200    Non-employee
210    Customer action
220    Other utility
222    Foreign worker
230    Motor vehicle
270    Telco master contractor
280    Petroleum/ chemical

300    Plant or equipment

400    Weather
410    Lightning

500    Miscellaneous

600    Unknown

Central Office (05xx)

0501     Dial up port
0502     Data port
0503     Packet switch
0504     Data link

0510     CO equipment
0511     Common equipment
0512     Linkage/network/grid
0514     Billing equipment
0515     Trunk
0516     Public service trunk
0517     Office conversation
0520     Translation
0521     Generic/par. work error
0522     Generic/par. document error

0525     Line work error
0526     Line document error
0527     Network work error
0528     Network document error
0529     Line work error CCSR

0530     Distribution frame
0531     MDF cross connection missing
0532     MDF cross connection broken
0533     MDF cross-connection work error

0540     Frame other
0541     MDF cable protector
0544     Terminal wire clipping/conn.

0550     Power
0551     DC power equipment
0552     AC power equipment
0553     Ringing plant
0554     Standby emergency power

0560     Misc. equipment
0562     Line testing equipment
0563     Concentrator
0564     Range extender
0565     Carrier system
0566     AMARC
0567     ISDN service

0568     SLC channel unit
0569     SLC common circuit pack

0570     Special services equipment
0572     Wiring option
0573     Carrier channel
0574     Signaling

0581     Mechanized system failure
0582     Line translations unknown
0586     Signal transfer point (stp)
0587     Tandem office
0588     Switching system design

0590     Data base for data base driven services
0591     Calling card services (ccs)
0592     Automatic callback calling
0593     Enhanced 911 service
0594     Equal access
0595     Watch alert other
0596     TOUCHSTAR
0597     700 series services
0598     Expanded 800 service
0599     Dial-it service

Remember, they may be different for your area!

Lineside
lineside@telehack.net