Tdm/Mcmp And Digital Bridge Capabilities - Paradyne COMSPHERE
3610 User Manual

COMSPHERE 3600 Series Data Service Units
ISDN DBM
The ISDN DBM childboards offer the following
features:
ISDN digital service restoration: Provides backup
capability if the DDS private line fails. The ISDN
DBM operates on a digital 2-wire 2B1Q
(U interface). The BRI operates with a 64 kbps
B-channel and a D-channel for signaling (1B+D).
Supports the following protocols and switches:
— AT&T 5ESS
— DMS-100
— NI-1 (National ISDN-1)
— NI-2 (National ISDN-2)
Data rates: Operates at 64 or 56 kbps full-duplex
and uses proprietary rate adaption to support data
rates of less than 56 kbps.

TDM/MCMP and Digital Bridge Capabilities

TDM capability allows up to six independent ports to
share one standard digital point-to-point facility. MCMP
capability allows up to six ports to share one standard
56 kbps multipoint facility. Digital bridge is available
with either TDM or MCMP. Similar features are:
Async/Sync conversion: Provides up to six ports
configurable for asynchronous-to-synchronous
operation.
FEP port sharing: Provides a method of
connecting a front-end processor (FEP) to two
consecutive ports to broadcast the same message
over the network and the shared ports.
Elastic store per port: Provides a transmit elastic
store buffer for each port to support extended
circuits. Supports both digital and analog
extensions.
Switched-carrier emulation: Provides optional
switched-carrier emulation for each port for both
the inbound and outbound directions.
1-4
TDM Capability
Additional TDM capability includes the following
features:
Port capacity: Allows up to six independent ports
to share one standard digital point-to-point facility.
Provides Port 1 on the DSU and five EIA-232 or
V.35 ports on the TDM circuit card. Model 3611
provides EIA-232 for Ports 2–6.
Digital sharing: Allows two groups of consecutive
ports to share the same TDM channel. All ports in a
digital-sharing group operate at the same speed and
receive the same data.
Models: There are two versions of the Model 3610
standalone TDM/Flex:
— 2-port TDM/Flex
— 6-port TDM/Flex
With either Flex model, each port can be set
independently as either an EIA-232 or V.35
interface.
Digital bridge: Performs digital bridge functions
and supports many applications, including
dedicated multipoint dial backup and multipoint
LADS operation.
Flexible device control: Provides the same
diagnostic capabilities as a point-to-point
3600 Series DSU without the TDM option. Allows
control of the TDM option from the front panel, or
from a 6700 or 6800 Series NMS.
Point-to-point backup: Allows a DSU with TDM
to have a DBM installed for point-to-point dial
backup.
MCMP Capability
Additional MCMP capability includes the following
features:
Channel capacity: Allows up to six virtual
multipoint circuits over one 56 kbps DDS
multipoint facility.
Digital sharing: Allows up to three digital-sharing
groups at each tributary site by assigning channels
to more than one port. All ports operate at the same
speed and receive the same data.
MCMP capability allows digital sharing and
multiplexing simultaneously at any tributary site.
December 1996 3610-A2-GB46-60