Specifications

Chapter 1 Introduction Installation and Operation Manual
1-4 Overview ASMi-54C LRS-102 Ver. 2.0
As mentioned above, PAF can be used to bond several SHDSL lines, where
each line can operate at a different rate. Bonding is possible only for lines
handled by the same SHDSL section (either the section handling ports 1 to 4,
or ports 5 to 8).
A significant advantage of bonding per IEEE 802.3-2005 is that a failure of a
SHDSL line does not drop the traffic being transmitted over the other wires in
the bonded group.
• The forwarding of Ethernet traffic is handled by the internal Layer 2 Ethernet
switching subsystem that fully complies with the IEEE 802.3/Ethernet V.2
standards, and has full VLAN support in accordance with IEEE 802.1Q and
802.1p. The Ethernet switch serves both traffic and management: traffic is
supported by means of the two external Ethernet ports of the module and
by internal ports connected to the SHDSL lines, and management is
supported by a dedicated port internally connected to the ASMi-54C
management subsystem, and by another Fast Ethernet port connected to
the management handling section of the CL modules installed in the LRS-102
(this section is available on all CL modules).
The internal Ethernet switching subsystem enables forwarding traffic
between the external Ethernet ports and the SHDSL lines. The internal
forwarding of Ethernet traffic can be configured in two ways:
 By specifying the ports (a mode identified as
unaware in accordance with
Metro Ethernet Forum (MEF) standards). In this mode, all the Ethernet
traffic reaching one of the ports is forwarded to the other port, and vice
versa
 By using VLANs for classification: (a mode identified as
aware in
accordance with Metro Ethernet Forum (MEF) standards). In this mode,
Ethernet traffic reaching one of the ports is forwarded to another port in
accordance with its VLAN identifier.
Capacity
A LRS-102 chassis can contain up to 12 ASMi-54C modules. The number of
ASMi-54 standalone modems that can be connected to a single ASMi-54C module
depends on the application requirements versus SHDSL range/bandwidth
considerations:
• When a single pair is sufficient to meet the transmission requirements, each
SHDSL port can be connected to a separate ASMi-54 standalone modem, for
a maximum of 96 modems per LRS-102 chassis.
• When more pairs are needed for each SHDSL line to reach the required
bandwidth/range performance, either two or four pairs can be combined:
 When all lines use the 4-wires modes, the total number is four ASMi-54
per ASMi-54C and a total of 48 modems per LRS-102 chassis
 When all lines use the 8-wires modes, the total number is two ASMi-54
per ASMi-54C and a total of 24 modems per LRS-102 chassis.
A LRS-102 chassis equipped to its full capacity (12 modules) with ASMi-54C
modules can thus provide links to 24 ASMi-54 standalone modems, for a total
capacity of 24 Ethernet ports per chassis (2.4 Gbps per chassis).