ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 64)

4. System Components
MSAP2000 Technical Manual V3.0 4-13
provides 8 lines of 2-Wire Analog Payphone Interfaces. FXS-P
generates 12 KHz or 16 KHz charge signals (software
configurable) on the RT end, to initiate the Payphones’ charging
functions. With no concentration or compression, the maximum
number of subscriber ports in one shelf is 128. The maximum
number of subscriber lines in one system, without having to
consider concentration or compression is 1024.
2W/4W E&M
The 2W/4W E&M Module (2W/4W Ear and Mouth Module)
provides 4 lines of 2-Wire or 4-Wire subscriber line services. The
dip switch on the module can be used determine whether a 2-wire
or 4-wire setting is to be used. Both 2W and 4W interfaces
conform to ITU-T G.712 standards. E&M supports circuit status
detection as well as signaling, and its voice frequency gain is
configurable by software. E&M supports Type V and Transmit
Only (TO) modes.
LULT
The LULT Module provides 4 lines of 2B1Q ISDN basic rate
transmission. The digital subscriber loop signals in this module
consist of dual course 144kbit/s 2B+D subscriber data, plus
4kbit/s of operation bits, and a 12 kbit/s synchronous bit rate
frame. Like the ISDN Exchange LT, LULT works as a “Master”
Digital Subscriber Line transmitter. It is installed in the RT of
MSAP2000, and its bit frame architecture conforms to ITU-T
G.797, ETSI ETR080, ANDSI T1.601-1992 specifications.
N64M
N64M provides a Nx64 Kbps Digital Transmission Interface.
N64M uses a V.35 standard port to conduct Digital Leased Line
services for Nx64 Kbps (N=1~31). Subscriber transmission
bandwidth can be configured via the LCT.
QE1M
QE1M provides 4 ITU-T G.703 E1 interfaces. It can be assigned
to work as a trunk interface module, or a subscriber test/network
test module, via LCT of NMS settings. As a subscriber interface
module installed on the RT side, it can be software configured to
provide Fractional E1 functions. Its bandwidth can be set to 64
Kbit/s timeslot, and cross-connected to any E1 interface on the
COT end, to form/groom E1 signals.
GSH
GSH provides 1 G.SHDSL (TDM-based) leased digital interface.
It is installed within the RT, and can work with G.SHDSL Modem
GSH-R to support ITU-T V.35, G.703 E1, and Ethernet interfaces.
A single System can provide up to 63 lines of GSH interfaces.
GSH supports ITU-T G.991.2, G.994.1, and Chunghwa Telecom’s
MD6230-1 specifications. GSH supports Nx64 Frequency Width
adjustment. The signals from GSH-R’s subscriber V.35 and E1
interface can be cross-connected to any E1 interface on the COT
end, to form/groom E1 signals. Maximum number of G.SHDSL
line per shelf is 16, while the maximum number of G.SHDSL line
per system is 128.