Paradyne COMSPHERE 3611 - Manual (Page 7)

COMSPHERE 3600 Series Data Service Units
1-2 September 1996 3610-A2-GB48-50
TDM Capability
TDM capability allows up to six independent ports to
share one standard digital point-to-point facility.
Additional TDM capability includes the following
features:
•
Three standalone versions: Model 3610 has three
TDM models:
— DSD (digital sharing device)
— Flex
— Standard
•
Flex option: There are two versions of the
TDM/Flex standalone model:
— 2-port TDM/Flex
— 6-port TDM/Flex
With either flex option installed, each port can be
set independently as either an EIA-232 or V.35
interface.
•
Port capacity: Model 3610 provides:
— Up to six EIA-232 or V.35 ports with DSD or
Flex models
— An EIA-232 or V.35 Port 1 option and five
EIA-232 ports for the Standard model
Model 3611 uses the Standard model and a six-port
DTE connector module. The connector module
includes six 25-pin DTE connectors and a 26-pin
high-density connector for the V.35 alternate Port 1
option. Model 3611 does not have V.35 for
Ports 2–6.
•
Port speeds: Individual TDM ports (1 through 6)
can be set to a variety of speeds. The sum of the
port speeds cannot exceed the DSU data rate.
•
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.
•
Data rates: Operates up to 64 kbps full-duplex.
•
Primary network interface: The alternate Port 1
on the DSU provides an internal aggregate data
stream. When the Network Interface configuration
option is set to forced on, the unused V.35 or
EIA-232 interface functions as an external TDM. A
connection can be made to any multiplexer or
DSU/CSU.
When the DSU powers up, data automatically
switches to the alternate Port 1. No DDS
connection is required. Any cluster controller
requiring subrate can be supported at a remote site.
Using the alternate Port 1 for the network interface
supports:
— DBM, TDM, and MCMP options
— Disruptive and Nondisruptive diagnostics
— Rate Adaption and In-Band Framing
— Aggregate data rates of 64, 56, 19.2, 9.6, 4.8,
and 2.4 kbps
•
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, an
async terminal, or 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. If backup is at a different port speed than
the DSU’s port speed, TDM operation
automatically changes to a second predefined port
speed to support dial backup operation at a lower
port speed.