ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 31)

2. System Architecture
MSAP2000 Technical Manual V3.0 2-11
2.9. Digital Cross Connect
MSAP2000’s Timeslot Interchange technology is based on VLSI,
to incorporate built-in Digital Cross Connect (DCS) functions into
its system platform. MSAP2000 can provide up to a maximum
of 2430 x 2430 64Kbps of Digital Cross Connect. This function
can greatly reduce the need for procuring additional DCS
equipment.
Concentration
MSAP2000 provides 1:1 service, when the COT is connected to
the Exchange Switch via a dual-wire FXO interface. 1:N
concentration service is provided when the COT is connected to
the Exchange Switch via a V5.2 E1 interface. The concentration
ratio can be configured through software settings. Moreover,
the concentration could be done on either COT or RT. If the
concentration is done at RT site, it could save trunk bandwidth.
Cross-connection
MSAP2000 employs the Time Slot Interchange (TSI) technology
to increase broadband efficiency. All Channel Assignments
(CA) are set at a 64Kbps timeslot, so that any input or output
ports from either the COT or RT can cross connect at 64 Kbps.
For example, any RT FXS, FXS-Payphone or E1 leased line
interface can be cross connected to its counterpart at the COT
end.
Grooming
V.35 and E1 interface signals from any RT input/output port,
including FXS, FXS-P, 2W/4W E&M, QE1M and STU-R, can be
groomed to any COT E1 interface at a 64Kbit/s timeslot. RT
Ethernet interfaces (ETF) and STU-R Ethernet Interface Signals
can also be connected to the COT’s ETH.