Specifications

98
RAD Data Communications 2009 Catalog
C R O S S C O N N E C T S
DXC Family
Multiservice Access Nodes
The DXC family consists of modular multiservice
access nodes, providing non-blocking DS0 cross
connect for up to 120 lines.
Plug-in interface modules can accommodate up
to eight links each (see Modules section on
page 100). Many services are supported,
including n x 56/64 kbps, ISDN, E1, T1, E3, T3,
and STM-1.
Cross connect, groomer and broadcast
All DXC modules allow maximum flexibility
between ports. A user-programmable
connection matrix connects any incoming
56/64 kbps timeslot to any outgoing 56/64 kbps
timeslot. It supports cross connect functions,
such as drop-and-insert, distribute and collect.
The DXC family enables the grooming of
fractional traffic from the user side into full E1/
T1, E3/T3 or STM-1 trunks, for connection to the
network. Grooming and bandwidth maximization
are implemented by placing the n x 56/64 kbps
data channels into an E1 or T1 frame (including
internal E1/T1 of the E3 or T3 modules or VC-12
containers of the STM-1 module), using only the
required number of timeslots. This provides
fractional CSU/DSU functionality.
The DXC family can broadcast any traffic
combination from a single input to numerous
destinations. Channel relocating and half duplex
conferencing are also supported.
E1/T1 converter
The DXC family is also capable of converting
between E1/T1 ports. A-law/µ-law and signaling
conversion are performed according to E1 and T1
standards. DXC-8R, DXC-10A and DXC-30 convert
up to 16 ports. T1 traffic can be directly extracted
from the STM-1 module (which can act as a
converter for up to 30 T1 links).
E3, T3 and STM-1 multiplexer modules
These modules provide full channelization
functionality for the multiplexing and
demultiplexing of DS0 traffic. Aggregated
payload is 34 Mbps for E3; 45 Mbps for T3; and
the equivalent of 61 Mbps for STM-1 (one
chassis). When chaining a number of units, the
aggregated payload is equivalent to 155 Mbps.
G.747 is supported by DXC-100 (see page 102).
Redundancy
The DXC family provides flexible redundancy and
protection to accommodate each user’s needs
and help minimize service downtime. The
modules’ link protection is user-programmable.
Hardware protection and partial or full
redundancy can be added at any time.
Redundancy in each unit:
• DXC-30 system redundancy (power supply
and common logic) is optional and can be
added at any time. Partial redundancy can
also be provided.
• DXC-8R has built-in full system redundancy
• DXC-10A has no system redundancy
• Most DXC modules support line redundancy
•
DS0 non-blocking cross connect and
groomer
•
Broadcast capabilities (point-to-
multipoint)
•
Compact 1U or 3U-high enclosure
•
Modular construction with four, five or
15 I/O slots
•
Services supported: n x 56/64 kbps,
ISDN, IDSL, SHDSL, E1, T1, E3, T3, and
STM-1
•
Optional system redundancy
•
Optional link and/or hardware
protection
•
Integrated fiber optic, SHDSL and IDSL
modems
•
Built-in E1/T1 converter, including
A-law/µ-law and signaling conversion for
PCM timeslots
ISDN U
SHDSL
LAN
E1/T1
n x 56/64 kbps
ASMi-52/FCD-IP
IDSL
ASMi-31
FCD-E1LC/
FCD-T1LC
Router/server
STM-1
NT1
n x E1/T1
OC-3
STM-1/OC-3
E3/T3
Backbone
DXC family
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