The modem remains the property of BTOR.
The situation is exactly the same as your gas or electric meter.
The unit is provided for you, but it remains the property of the utility company.
Note that you are required to take reasonable care of it and that any damage to it may be chargeable by BT to you - in much the same way as if you damaged a gas meter Transco would send you the (big) bill.
Edited by zom22 (Tue 09-Apr-13 19:19:57)