PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 62

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

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)
– IDP1 is inactive during B1 and B2
– IDP0 carries the 2B+D channels coming from S/T interface, and the MONITOR and C/I
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).
Figure 30
IOM
IOM
Semiconductor Group
and the MONITOR and C/I channel as output to the layer-1
channels from layer-1.
®
®
S/T Interface
Data Ports 0, 1 in Non-Terminal Mode (SPCR:SPM=1) with Normal
Direction (SQXR:IDC=0)
IDP0
IDP1
Layer
(SBC)
B1
B1
1
IOM
S / T
IDP0
IDP1
R
S / T
IOM
ISAC -S
R
B2
B2
R
IDP0
Layer 2
(ICC)
62
IDP1
MON,
D, C/I
MONITOR
MONITOR
ITS02348
Layer
Layer 2
IDP0
IOM -2 Interface
B1/B2
IDP1
Functional Description
1
R
D
D
Layer 2
Layer
1
C /
C /
Line-Card
Controller
e.g. EPIC
PEB
2055
ITD03425
M
R
M
R X
TM
M
M
X