CROCUS
Nx64K Module
- Interface modules for the Crocus
HDSL and Crocus SDSL modems designed to work at any multiple of
64 kbps
- Modular plug-in module for maximum
flexibility and efficient stock management
- Full control over G.704 time-slot
mapping
- For desktop and rack-mount equipment
- Fallback supported in case of line
problems (Crocus HDSL)
- Full configuration through the maintenance
or management system
The CROCUS HDSL
and CROCUS SDSL modems can be equipped with a wide range
of modular exchangeable interfaces, ensuring high-speed interconnection
solutions for an extremely wide set of applications. The Nx64k family
of interfaces offers to the connected application any speed between
64kbps and the actual line-speed, in multiples of 64 kbps. The interface
modules are available conform to recommendations V.36, V.35, RS-530
and X.21, or can be combined with an Ethernet bridge or IP-Routing
functionality. At either side of the communication link different
types of interfaces may be used.
A typical application
is the high bandwidth access to packet based backbone networks (IP,
X.25, Frame Relay). The access bandwidth of each user is under total
control of the network operator.
Access with configurable bandwidth
to a packet switched network
It is also possible
to combine a Nx64k type of interface at one side with a G.703 interface
(with G.704 framing) at the other side of the link. The Nx64k data
stream is mapped into G.704 time slots (fractional E1) and is output
on the G.703 interface at the other end of the connection. This time-slot
mapping is entirely under operator control, offering the largest possible
flexibility for the interconnection to a G.704 based Digital Access
Cross Connect System (DACCS) or a SDH backbone.
A typical application
is the high bandwidth digital leased line service where the user can
ask for a subscription at any multiple of 64 kbps.
The Crocus HDSL offers
a 2Mbit service using 2 or 3 line pairs. However, if the modem is
equipped with a Nx64k module, it can operate with a reduced number
of line pairs, offering a reduced speed at the interface. Automatic
speed adaptation as a function of the number of connected pairs is
supported. On G.704 framing level, a prioritisation mechanism guarantees
the preservation of a predefined set of time-slots upon a line pair
fallback operation.
The configuration of
the Crocus HDSL or Crocus SDSL includes total control over the Nx64k
modules and can also be performed from the central management system.
Therefore, the central management can determine and dynamically adapt
the access speeds on different points in the managed network.
Digital leased line interconnection
with configurable bandwidth
TECHNICAL SPECIFICATIONS
Digital Nx64k interfaces
· V.35 ISO 2593 (female 1,6mm pin)
· V.36/RS-449 ISO 4902 (DB37 female)
· X.21 ISO 4903 (DB15 female)
· RS-530/RS-530A ISO 2110 (DB25 female)
Can also be operated in V.24/V.28 mode
(max 128 kbps)
· Bridge 10BaseT (RJ45), Conform IEEE
802.3
Integrated Bridge functionality
· IP Router 10BaseT (RJ45), Conform
IEEE 802.3
Integrated IP routing functionality
Interface speeds
Crocus HDSL
· Transparent mode (interface speed
= line-speed)
· Speed = 2048 kbps
· Compatible with other transparent
interface modules
· Compatible with other Nx64 kbps interface
modules in transparent mode
· Compatible with other G.703/E1 interface
in unframed mode
· N x 64 kbps mode
· Speed = N x 64 kbps (N=1..31)
· Compatible with other Nx64 kbps interface
modules
· Compatible with other G.703/E1 interface
in framed (G.704) mode
· Prioritisation mechanism for reduced
line pair operation
Crocus SDSL
· Transparent mode (interface speed
= line-speed)
· Speed = 128*, 384, 768, 1152 kbps
· Compatible with other transparent
interface modules
· Compatible with other Nx64 kbps interface
modules in transparent mode
· N x 64 kbps mode
· Speed = N x 64 kbps (N=1..17)
· Compatible with other Nx64 kbps interface
modules
· Compatible with other G.703/E1 interface
in framed (G.704) mode
Crocus SDSL 2M
· Transparent mode (interface speed
= line-speed)
· Speed = 128, 256, 384, 512, 768,
1152, 1536, 2048, 2304 kbps
· Compatible with other transparent
interface modules
· Compatible with other Nx64 kbps interface
modules in transparent mode
· Compatible with other G.703/E1 interface
in unframed mode (2048 kbps only)
· N x 64 kbps mode
· Speed = N x 64 kbps (N=1..31)
· Compatible with other Nx64 kbps interface
modules
· Compatible with other G.703/E1 interface
in framed (G.704) mode
* Note: 128 kbps line-speed is not
available on all versions of Crocus SDSL
Clocking (where applicable):
· Internal
· External
· Slave/Receive
· Automatic clock adaptation on reduced
line pair operation (Crocus HDSL only)
Environmental requirements
· Ambient operational temperature 0°C
to 50°C
· Storage temperature -25°C to +70°C
· Maximum altitude 3000 m
· Relative humidity 0% to 95% non-condensing
Related sales items
· 149.377 V36 (N.64K) INTF.CROCUS
· 149.378 V35 (N.64K) INTF. CROCUS
· 149.379 X21 (N.64K) INTF. CROCUS
· 161.612 RS-530 (N.64K) INTF. CROCUS
· 162.602 BRIDGE INTF.(N.64K) CROCUS
· 161.614 ROUTER INTF.(N.64K) CROCUS
· 143.664 G703 INTF.CROCUS HDSL
· 154.404 G703 INTF.CROCUS SDSL-FO
· 165.899 G703 INTF.CROCUS SDSL 2M
Nx64k interfaces
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