PEB3265 Infineon Technologies Corporation, PEB3265 Datasheet - Page 66

• Manufacturer Part Number: PEB3265
• Description: (PEB326x / PEB426x) Dual Channel Slicofi-2 / Slic Duslic
• Manufacturer: Infineon Technologies Corporation

Preliminary
In the event of pauses < 20 ms:
• If the pause is followed by a tone pair with the same frequencies as before, this is
• If the pause is followed by a tone pair with different frequencies and if all other
DTMF decoders can be switched on or off individually to reduce power consumption. In
normal operation, the decoder monitors the Tip and Ring wires via the ITAC pins
(transmit path). Alternatively the decoder can be switched also in the receive path. On
detecting a valid DTMF tone pair, SLICOFI-2 generates an interrupt via the appropriate
INT pin and indicates a change of status. The DTMF code information is provided by a
register which is read via the digital interface.
The DTMF decoder also has excellent speech-rejection capabilities and complies with
Bellcore TR-TSY-000763. The algorithm has been fully tested with the speech sample
sequences in the Series-1 Digit Simulation Test Tapes for DTMF decoders from
Bellcore. The characteristics of DTMF detection can be controlled by POP registers 30h
to 39h.
3.8.2
A generator to send calling line identification (Caller ID, CID) is integrated in the DuSLIC
chip set. Caller ID is a generic name for the service provided by telephone utilities that
supply information like the telephone number or the name of the calling party to the
called subscriber at the start of a call. In call waiting, the Caller ID service supplies
information about a second incoming caller to a subscriber already busy with a phone
call.
In typical Caller ID (CID) systems, the coded calling number information is sent from the
central exchange to the called phone. This information can be shown on a display on the
subscriber telephone set. In this case, the Caller ID information is usually displayed
before the subscriber decides to answer the incoming call. If the line is connected to a
computer, caller information can be used to search in databases and additional services
can be offered.
There are two methods used for sending CID information depending on the application
and country-specific requirements:
• Caller ID generation using DTMF signaling (see
• Caller ID generation using FSK
DuSLIC contains DTMF generation units and FSK generation units which can be used
for both channels simultaneously.
The characteristics of the Caller ID generation circuitry can be controlled by POP
registers 00h, 43h to 4Ah.
Data Sheet
interpreted as drop-out.
conditions are valid, this is interpreted as two different numbers.
Caller ID Generation (only DuSLIC-E/-E2/-P)
66
Chapter
3.8.1)
Functional Description
2000-07-14
DuSLIC