363-206-305
Applications
Issue 3 June 2000
2-9
DDM-2000 FiberReach Network
Topologies (OC-1)
2
Business Carrier Access is one of today's fastest growing network applications.
To supply the advanced communications services demanded by many business
customers, local exchange carriers and competitive access providers are
dedicating access networks between these customers and their wire centers.
Long-distance voice and data services (for example, 1-800 reservations and
customer support lines) are delivered from interexchange carrier (IXC) points of
presence (POP) to the access networks along with any intra-LATA services
needed by the customer. Network survivability, leading edge services, and quick
response to changing end user demands are cornerstones of this market.
Small businesses and branch offices are increasingly sophisticated
telecommunications users, demanding the advanced services, survivability, and
network performance traditionally afforded only the large business locations.
While many locations may get by today with a DS1 and a few voice lines, fast
emerging LAN interworking, video conferencing, and other data and image
applications require an access network of great flexibility. With the DDM-2000
FiberReach system, network providers have an unsurpassed opportunity to
expand and compete in this critical market.
Where services are at the DS1 rate and above, DDM-2000 networks supply all the
host functions a DDM-2000 FiberReach needs. However, switched service
network providers require a forward-looking access network that handles DS0,
specials, ISDN, and telephony with DS1 high capacity services in an integrated
offering. Where telephony, DS0, and ISDN services are needed, the
SLC
-2000
Access System host supplies powerful bandwidth management and operations for
DS0 level channel units, testing, and TR08/TR303 integrated switch interfaces.
DDM-2000 FiberReach is typically placed at customer locations, in
telecommunications equipment rooms and closets, and often connects to an
OC-3 or OC-12 backbone feeder ring at a nearby cabinet, controlled environment
vault (CEV), or other remote terminal location. Alternatively, customer sites near a
wire center can be served by OC-1 facilities directly from the wire center,
bypassing the backbone feeder ring.
Basic Wideband Shelf Configurations
2
DS1 and T1 Services
2
The examples in this section provide DS1/T1 services only. If the NBS and DS0
level services are needed, a FiberReach Wideband Shelf must be co-located with
SLC-2000 systems on the OC-3/OC-12 rings to provide DS1 connections from the
SLC-2000 MDS shelves to the FiberReach OC-1 ring.
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