If you are experiencing trouble with a Modem, DSU/CSU, ISDN Terminal Adapter or managed Rack System, please have the following information available: 

- The exact model number of the device.
- The initialization string or configuration you are using.
- The error or symptom you are experiencing.
- A short description of how you expect the device to be operating correctly.
Repair Service

If equipment does not operate properly when tested in accordance with the instructions, it should be returned to an authorized service center for repair. Call or write Customer Service for a Return Material Authorization prior to shipping any equipment to the factory. When returning equipment for repair, utmost care should be taken to avoid shipping damage. If available, use the original cartons and packing material. Shipping charges should be prepaid.

If the equipment is covered by warranty, it will be repaired free of charge or replaced, at the Company's option, and returned prepaid. Unauthorized field repairs or modifications will invalidate the warranty.

For out-of-warranty repair work, Customer Service will provide a quotation for repair charges first, unless the shipment is accompanied by a purchase order. Repair work will be performed after authorization to proceed (in the form of a purchase order) is received.

Service Center
CXR Telcom Corporation
Attn: Customer Service
47971 Fremont Boulevard
Fremont, CA 94538-6508

(510) 657-8810
(510) 657-1158 (FAX)