Deutsche Telekom T-Eumex 504PC SE - Manual (Page 108)

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Appendix
Customer Service
If you experience technical problems with your communications system, call our
T-Service hotline number 0180 51990 (you will be charged for your call). Experienced
technicians can also advise you on the operation of your system. Please have the serial
number of the communications system ready when you call. You will find this number
on the base of the housing.
If you suspect that your ISDN connection is faulty, please contact your network
provider’s Customer Service department. Deutsche Telekom’s freephone T-Service
number is 0800 330 2000.
Problem Possible cause Solution
USB cable is too short Use an active
USB extension cable
(max. 5 x 5 m permissible)
If the problem persists, our Hotline is there to assist you. You will find the telephone
number below in the chapter entitled "Customer Service."