Tdm Architecture And Signal Flow; Tdm Architecture - Paradyne 3610 Application Manual

TDM Architecture

Figure 4-3 shows a high-level view of the TDM
architecture. Port 1 on the DSU is routed to the TDM or
MCMP, where it is multiplexed with Ports 2 through 6.
The aggregate data path of the multiplexer is routed back
to the DDS core* by the data router.
The data router is a sophisticated circuit switch in the
DSU that is capable of connecting several communication
interfaces in a variety of ways. For example, if the DSU
receives an out-of-service network code and is equipped
with a DBM, the data router may be commanded to route
the aggregate data stream from the TDM or MCMP circuit
card to the V.32 core, to be transmitted over a dial backup
connection to the DBM at the tributary site.
Port 1 provides either a physical EIA-232-D/V.24 or
V.35 interface. Ports 2 through 6 comply with a subset of
EIA-232 interface recommendations. The circuit leads
supported on Ports 1 through 6 are discussed in
Appendix C.
* A core is any module that provides data transmission capabilities. The V.32 DBM has a V.32 core, which
complies with the CCITT V.32 modem recommendation.
3610-A2-GB41-70
Figure 4-3. TDM Architecture and Signal Flow
July 1999
NOTE
Throughout this document,
Port 1 refers to either the
EIA-232-D/V.24 or V.35 physical
interface connectors on the DSU.
For non-modular Model 3611 DSUs operating in TDM
mode, a TDM interface (multiplexing) cable attaches to
the multiport connector on the TDM circuit card to
provide fan-out cabling to five individual 25-pin EIA-232
connectors (Ports 2 through 6). The pin assignments for
this cable are provided in Appendix
Model 3611 or Model 3610 DSUs operating in TDM
mode, all port connectors are individual and a separate
crossover cable is required for each connector.
Principles of Operation
C. For modular
4-7