PEB2445NV1.2 Lantiq, PEB2445NV1.2 Datasheet - Page 51

• Manufacturer Part Number: PEB2445NV1.2
• Manufacturer: Lantiq

Specifications of PEB2445NV1.2

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Input lines
Output lines
IA7/IA6
IA5
Access 2 to CCM
C3
IA7/IA6
IA5
The interface select bits have to be programmed as shown in the following table:
Table 14
Interface Selection Bits
Access 1 to CCM
C3
D9
D8
D9/D8
D7/D6
D5
D4
Semiconductor Group
C0
D0
C0
D0
IA0
IA0
Logical 4
Inversion bit: In a multiparty conference there is some risk of instability due
to reflections at the hybrid. If these reflections are not cancelled, they will
be summed up in the conference sum and will be transmitted to the
subscriber, where again they could be reflected. In very big conferences
(>> 4 subscribers) this behaviour could result in an instability.
To avoid this the PEB 2445 has the ability to invert every second
conference channel, which has no audible influence on the speech quality.
By this the noise due to reflections is compensated to a high degree.
The feature can also be applied to reduce noise due to line impedence
mismatch.
Logical line and time-slot number of the inputs (see table 12, 13 and 14)
Logical 0
Conference control address
Logical 8
Noise suppression threshold
Input attenuation level
Output attenuation level
Note: D7, D6, D5 are only relevant to conference mode; in the multipoint
Conference number: 21 independent simultaneous conferences are
possible. By using the conference number 1F
suppression can be inserted in a channel without conferencing.
Logical 0
Conference control address
switching mode these bits must be logical 0.
System Interface
01
0
H
H
, 6
, A
H
H
51
Synchronous 2-MHz Interface
10
1
Detailed Register Description
H
an attenuation or noise
PEB 2445
02.96