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| PSB2168 Datasheet, PDF (37/185 Pages) Siemens Semiconductor Group – Digital Answering Machine SAM | |||
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PSB 2168
Functional Description
2.1.10 Digital Interface
There are two almost identical interfaces at the digital side as shown in figure 19. The
only difference between these two interfaces is that only channel 1 supports the SSDI
mode.
Channel 1 (SSDI/IOM®-2 Interface)
I1
S6
I2
ATT1
I3
Channel 2 (IOM®-2 Interface)
I1
S8
I2
ATT2
I3
HP
S5
HP
S7
Figure 19 Digital Interface - Block Diagram
Each outgoing signal can be the sum of two signals with no attenuation and one signal
with programmable attenuation (ATT). The attenuator can be used for artificial echo if
there is none externally provided (e.g. ISDN application). Each input can be passed
through an optional high-pass (HP). The associated registers are shown in table 20.
Table 20 Digital Interface Registers
Register # of Bits Name
Comment
IFS3
5
IFS3
5
IFS3
5
IFS3
1
IFS4
5
IFS4
5
IFS4
5
IFS4
1
I1
Input signal 1 for S6
I2
Input signal 2 for S6
I3
Input signal 3 for S6
HP
High-pass for S5
I1
Input signal 1 for S8
I2
Input signal 2 for S8
I3
Input signal 3 for S8
HP
High-pass for S7
Semiconductor Group
37
11.97
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