PSB4596 Siemens Semiconductor Group, PSB4596 Datasheet - Page 78

• Manufacturer Part Number: PSB4596
• Description: Analog Line Interface Solution ALIS
• Manufacturer: Siemens Semiconductor Group

10
10.1
Pulse dialing will be implemented by shortening the line with external transistor T1. Pulse
timing must be controlled by the host. Pulse shaping is implemented in ALIS-A and
complies with ETS 300 001
10.2
DTMF Dialing is implemented by two internal tone generators (see “Programming the
ALIS DTMF Tone Generators” on page 78). Since the level of tone generator 2 is 3 dB
higher than that of tone generator 1, the former should be used for the high frequency
group. The frequency accuracy of the tone generators is better than 1%. The absolute
transmission level can be programmed using the AX filter. Software for computing the
coefficients is available.
The tone generators can also be used to generate any in-band sine wave for test or
measurement purposes.
10.2.1 Programming the ALIS DTMF Tone Generators
Two independent tone generators are available. When one or both of them are turned
on, the voice signal is switched off automatically. A programmable bandpass filter is
included to make the generated signal suitable for DTMF. The default frequency for both
tone generators is 2000 Hz. Coefficients for other frequencies are generated by a
software tool.
Byte sequences for programming both tone generators and bandpass filters:
Semiconductor Group
Frequency
1209 Hz
1336 Hz
1477 Hz
1633 Hz
697 Hz
770 Hz
852 Hz
941 Hz
Modem Functions
Pulse Dialing
DTMF Dialing
Command
0B *)
0B *)
0B *)
0B *)
0C *)
0C *)
0C *)
0C *)
Byte 1
AA
1D
EC
9B
11
12
13
32
78
Byte 2
AC
B3
3C
1B
1D
3B
33
32
Analog Line Interface Solution
Byte 3
PSB 4595 / PSB 4596
5A
5A
5B
5C
52
52
51
51
Modem Functions
Data Sheet 06.98
Byte 4
CC
D2
2C
C3
B3
32
22
25