PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 26

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

Figure 5
Applications of the ISAC
Terminal Applications
The concept of the ISDN basic access is based on two circuit-switched 64 kbit/s B channels
and a message oriented 16 kbit/s D channel for packetized data, signaling and telemetry
information.
Figure 6 shows an example of an integrated multifunctional ISDN-S terminal using the
ISAC-S. The ISAC-S provides the interface to the bus and separates the B and D channels.
The D channel, containing signaling data and packet switched data, is processed by the LAPD
controller contained in the ISAC-S and routed via a parallel P interface to the terminal
processor. The high level support of the LAPD protocol which is implemented by the ISAC-S
allows the use of a low cost processor in cost sensitive applications.
The IOM-2 interface generated by the ISAC-S is used to connect different voice/data (V/D)
application modules:
– sources/sinks for the D channel
– sources/sinks for the B1 and B2 channels.
Semiconductor Group
TE(1)
TE(8)
TE(1)
TE(1)
TE(8)
S
®
-S (ISDN Basic Access)
Direct Subscriber Access
passive Bus)
(point-to-point, short and extended
Card
Line
LT-S
LT-S
PABX (NT2)
CP
26
CP
SN
SN
=
= Switching
Central
Processor
Network
LT-T
S
T
NT1
NT1
=
ISAC -S
ITS02315
R
U
U
Features