Functional Description
Non-Terminal Mode (SPCR:SPM=1)
Outside the programmed 4-byte subscriber channel (bits CSEL2-0, ADF1 register), both IDP1
and IDP0 are inactive.
Inside the programmed 4-byte subscriber channel (see figure 30):
– IDP1 carries the 2B+D channels as output towards the subscriber (i.e. to the S/T interface)
and the MONITOR and C/I channel as output to the layer-1
– IDP1 is inactive during B1 and B2
– IDP0 carries the 2B+D channels coming from S/T interface, and the MONITOR and C/I
channels from layer-1.
If IDC (IOM Direction Control, SQXR register) is set to "1", IDP0 sends the MONITOR, D and
C/I channels normally carried by IDP1, i.e. normally destined to layer-1 S/T interface. This
feature can be used for test purposes, e.g. to send the D channel towards the system instead
of the subscriber (see figure 31).
ISAC R -S
IOM R -2 Interface
S/T Interface
B1/B2
Line-Card
IDP0
Controller
IDP0
IDP1
Layer 1
(SBC)
IDP1
e.g. EPICTM
PEB 2055
MON, D, C/I
IDP0 IDP1
Layer 2
(ICC)
ITS02348
M M
IDP0
IDP1
B1
B1
B2
B2
MONITOR
D
D
C / Ι
R
X
R
S / T
IOM
S / T
Layer 1
Layer 2
M M
MONITOR
C / Ι
R
X
R
IOM
Layer 2
Layer 1
ITD03425
Figure 30
IOM® Data Ports 0, 1 in Non-Terminal Mode (SPCR:SPM=1) with Normal
IOM® Direction (SQXR:IDC=0)
Semiconductor Group
62
INFINEON [ Infineon ]
