HFC-4S Cologne Chip AG, HFC-4S Datasheet - Page 197

• Manufacturer Part Number: HFC-4S
• Description: Isdn HDLC Fifo Controller With 8 (4) Integrated S/t Interfaces
• Manufacturer: Cologne Chip AG

8.4 Conference setup example for CSM
The following example shows the register settings for a conference with three members. Two mem-
bers are located on the PCM interface side while the other one is located on the S/T interface side.
The example uses conference number 2. It is specified in Table 8.2.
Only two FIFOs are used in this example. Channel select mode should be selected to avoid unneces-
sary FIFO usage
switching buffer (see Fig. 3.3 and 3.3).
are enabled, so that in Simple Mode all FIFOs with the same number are blocked.
March 2003 (rev. A)
HFC-4S
HFC-8S
➊
1
Remember that in Simple Mode FIFO numbers are equal to HFC-channel numbers. In the example four HFC-channels
A PCM conference member can be looped over an arbitrary HFC-channel. In this example
HFC-channel[6,TX] is used for the first PCM conference member. The conference is enabled
only on the transmit time slot of the PCM interface.
#11
#11
FIFOs
RX
TX
Conference member
S/T member
1
2
1
×Ø
Ò
. A PCM member allocates a single HFC-channel to establish the data loop via the
PCM member
PCM member
1
2
Table 8.2: Conference example specification
loop
loop
#6
#6
Multiparty audio conferences
Figure 8.1: Conference example
: S/T interf. #1, RX B1
: S/T interf. #1, TX B1
: PCM slot[5,RX]
: PCM slot[5,TX]
: PCM slot[20,RX]
: PCM slot[20,TX]
RX
TX
Data Sheet
3
Connection
#4
#4
RX
+
TX
Conference #2
Conference #2
PCM slot[6,TX]
PCM slot[6,RX]
HFC-channel[6,TX]
HFC-channel[6,TX]
HFC-channel[6,RX]
HFC-channel[6,RX]
-
-
-
S/T interf.
PCM slot
#1
#1
#20
#20
#6 TX
#6
#5
#5
B1
B1
RX
RX
RX
TX
TX
RX
TX
loop
Cologne
Chip
S/T member
1st PCM member
1st PCM member
2nd PCM member
2nd PCM member
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