Deutsche Telekom T-Eumex 504PC SE - Manual (Page 114)

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Appendix
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Switching back and forth between two calls. You can accept incoming calls even
though you are already making a call, or have an enquiry call with other participants
involved in the call.
USB
Stands for “Universal Serial Bus,” a fast serial interface with a transfer rate of up to 12
Mbit/s. A (theoretical) maximum of 127 devices can be operated on a single USB
interface, and the devices can be plugged in or unplugged while the computer is still
running.
Vanity
Instead of using digits, the Vanity caller dials a number using characters on an
alphanumeric keypad. Vanity telephony makes it much easier to remember telephone
numbers, because names or expressions are used instead of those numbers.
You press the digits corresponding to the characters printed on the keys, e.g. for A, B
or C you press 2.
You can, for example, contact Deutsche Telekom’s Service and Ordering Hotline
under the easy-to-remember number 0800 - TELEKOM, which corresponds to the
number 0800 - 8353566 but is much more easily noted.