peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 224

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

Semiconductor Group
3.1.6.2.3
After the CM-reset, all CFI time-slots are unassigned. If the CFI is used as a plain PCM-
interface, i.e. containing only switched channels (B-channels), the initialization steps
below are not required. The initialization of pre-processed channels applies only to IOM-
or SLD-applications.
An IOM- or SLD- “channel” consists of four consecutive time-slots. The first two
time-slots, the B-channels need not be initialized since they are already set to
unassigned channels by the CM-reset command. Later, in the application phase of the
software, the B-channels can be dynamically switched according to system
requirements. The last two time-slots of such an IOM- or SLD-channel, the
pre-processed channels must be initialized for the desired functionality. There are five
options that can be selected:
Table 3-2 Pre-processed Channel Options at the CFI
Even CFI Time-Slot
Monitor/feature control channel
Monitor/feature control channel
Monitor/feature control channel
Monitor/feature control channel
Monitor/feature control channel
Also refer to Figure 3-4.
Example
In CFI-mode 0 all four CFI-ports shall be initialized as IOM-2 ports with a 4-bit C/I-field
and D-channel handling by the SACCO-A.
CFI time-slots 0, 1, 4, 5, 8, 9… 28, 29 of each port are B-channels and need not to be
initialized.
Initialization of Pre-processed Channels
Odd CFI Time-Slot
4-bit C/I-channel, D-channel
handled by SACCO-A and D-ch.
arbiter
4-bit C/I-channel, D-channel not
switched (decentral D-ch.
handling)
4-bit C/I-channel, D-channel
switched (central D-ch. handling)
6-bit SIG-channel
8-bit SIG/channel
3-18
Operational Description
Main
Application
IOM-1 or IOM-2
digital subscriber
IOM-1 or IOM-2
digital subscriber
IOM-1 or IOM-2
digital subscriber
IOM-2, analog
subscriber
SLD, analog
subscriber
PEB 20560
2003-08