ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 22)

2. System Architecture
MSAP2000 Technical Manual V3.0 2-2
error codes in any channel. Not only does this function help
towards network maintenance and problem elimination, it also can
safeguard service quality.
2.2. SDH ADM
In a legacy access network infrastructure, the DLC’s COT (central
office terminal) requires an additional SDH optic multiplexer, to be
able to extend the user interface to the DLC RT (remote terminal),
via an optic fiber network. This type of network infrastructure in
which the SDH multiplexer and DLC are separated, will increase
the burden of equipment and maintenance cost born by Service
Providers. MSAP2000’s integrated platform merges the SDH
ADM optic multiplexer and the DLC System within a single shelf,
bringing the following benefits to Service Providers:
Competitive
Benefits
„ Cuts down on the high amount of E1 interfaces normally
required for SDH and DLC connection, which in turn will lower
facility costs.
„ Integration of SDH and DLC on a common shelf will save
space in COTs and outdoor cabinets.
„ An integrated NMS can lower operational costs for Service
Providers.
Tributary Interface
MSAP2000 supports ITU-T G.707 and G.957 standards. 2340
64Kbps Time Slots can be randomly added & dropped, and up to
63 E1 interfaces are provided. MSAP2000 also supports the
following Tributary Interfaces:
„ ITU-T G.703 E1 Interface
„ ITU-T V.35 NX64 Kbps Interface
„ ITU-T
G.SHDSL Interface
„ ITU-T G.751 E3 Interface
„ IEEE 802.3 10/100 Ethernet
1:1 & Ring
Protection
MSAP2000 supports automatic protection switching (APS) and
1:1 protection switching. Manual or forced switch protection may
also be conducted, and the protection switch time is less than
50ms. Protection switching will not disrupt ongoing voice
services.
Ethernet over SDH
MSAP2000 supports Ethernet over SDH (EoS) which conform to
ITU-T G.7041, to provide next generation IP broadband services.