Interphase Tech RAS Communications Controller 5536 - Manual (Page 216)

FCC
196 Interphase Corporation
If you experience trouble with this equipment, please contact
Interphase Corporation at 214-654-5000 for warranty
information. If the trouble causes harm to the telephone
network, the telephone company may request the removal of
the equipment from the network until the problem is resolved.
No repairs may be performed by the customer. Repairs are to
be made only by Interphase Corporation or its licensees.
Unauthorized repairs void registration and warranty.
It is recommended that the customer install an AC surge
arrester in the AC outlet to which this device is connected. This
is to avoid damaging the equipment caused by local lightening
strikes and other electrical surges.