Optioning; Timeslot Cross-Connect Map; Timeslot Allocation - ADTRAN 6540 Installation And Maintenance Practice

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice

OPTIONING

Timeslot Cross-Connect Map

The SHDSL 2-Wire/4-Wire NTU Product Series supports the configuration of multiple
services.
A service is comprised of an arbitrary collection of timeslots from the SHDSL interface that are
configured through the management interface. These services are routed to either the G.703
interface or the Nx64k interface. The SHDSL 2w4w NTU supports simultaneous use of the
G.703 interface (for multiple services) and either, but not both, the X.21, V.35, or V.36 Nx64K
port interfaces. When there is only a single service from the G.703 interface, then the number
of timeslots in that service must be less than or equal to 32. The SHDSL timeslots that are not
assigned to a service are considered idle, and contain a fixed bit pattern of All Ones. Idled
G.704 framed timeslots contents are determined by a programmable pattern register.
The SHDSL 2-Wire/4-Wire NTU Product Series supports the following interfaces and
operation:
• A Nx64K single service interface with a data transmission rate of 64 kbps to 2.304 Mbps in
2-wire mode (N × 64 kbps, where N = 1 to 36) or 64 kbps to 4.608 Mbps in 4-wire mode (N
× 64 kbps, where N = 1 to 72).
• A G.703 interface with G.704 framing, with a single or multiple G.703 services with a data
transmission rate from 64 kbps to 1.984 Mbps (N × 64 kbps, where N = 1 to 31). G.704
framing may be either passed through delivered to end devices, or generated and
terminated locally at the NTU G.703 port. In the former case, G.704 framing must be
assigned to SHDSL timeslot 0. In the latter case, no G.704 framing passes across the
SHDSL line.
• The G.703 interface with G.704 framing runs over SHDSL in aligned mode and supports
simultaneous services using the Nx64k port for the second service.
• A G.703 interface without framing, with a single 2.048 Mbps service (32 × 64 kbps), and
therefore the only service configured.

Timeslot Allocation

The SHDSL timeslots are individually mapped to the required G.703/G.704 and Nx64k
service timeslots on a one-to-one basis. As illustrated in
contiguous and non-contiguous service allocations are allowed, as long as the chronological
transmission ordering of timeslots is maintained.
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Figure 11 and Figure 12, both
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