AT&T System 25 - Manual (Page 6)

that certification in writing may be required when an existing
multifunction system is being reconfigured as a Key system, if the
customer desires the lower rate.
— For Digital connections with D4 Framing Format provide the Facility
interface code 041DU9-B, for digital connections with Extended Framing
Format, provide the Facility interface code 04DU9-C. You must also
specify the service order code, 6.0Y.
— The quantities and USOC numbers of the jacks required.
— For each jack, provide the sequence in which lines are to be connected;
the type lines and the facility interface code and the ringer equivalence
number by position, when applicable.
This telephone equipment should not be used on coin telephone lines.
Connection to party line service is subject to state tariffs.
REPAIR INSTRUCTIONS
If you experience trouble with this telephone equipment, contact the AT&T
Business Customer Service Center on 1-800-242-2121. The telephone company
may ask that you disconnect this equipment from the network until the problem
has been corrected or until you are sure that this equipment is not
malfunctioning.
System 25 troubles that must be escalated to a higher level of maintenance
should be referred to the National Service Assistance Center on 1-800-628-2888.
RIGHTS OF THE TELEPHONE COMPANY
If your telephone equipment causes harm to the telephone network, the
telephone company may discontinue your service temporarily. If possible, they
will notify you in advance. But if advance notice isn’t practical, you will be notified
as soon as possible. You will be informed of your right to file a complaint with the
FCC.
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