System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Interfaces
Aastra Proprietary Information Page 5-5
5.3 Interfaces
In the XMP1 system, the SDSL expansion provides the following interfaces:
Figure 5.1: Interfaces - SDSL expansion
5.3.1 SHDSL
The SDSL interface of the SHDSL line equipment can be configured for
1-pair operation (2-wire) or 2-wire Highspeed operation. The 4-wire mode
(2 pairs) is in preparation. Transmission is full-duplex for each pair. The
required separation of directions is ensured by an echo compensation
procedure. An a/b reversal within a pair is permitted.
For applications not requiring the entire traffic bandwidth of 2048 kbit/s, it is
possible to transmit with a lower bandwidth and achieve a longer coverage
range. The traffic bandwidth can be configured to any value in the range of
nx64 kbit/s
(n= 3.....32).
On a SDSL link, one terminal must be configured as Master (LT), the other
one as Slave (NT). The required traffic bit rate is adjusted in the LT. The
values set are then taken over by the NT (Rate Adaption).
The management of a complete transmission section including repeaters is
performed by the Master (LT). An 8 kbit/s EOC channel integrated in the
SDSL signal and transmitted on the trunk line together with the traffic data
is used for this purpose. This EOC channel permits each unit available on
the SDSL link to be accessed by the user.
RPS-XMP1
+UB
ISHDSL
4 x SHDSL
4 x E1 external
SD bus
4 x FSP
X500 X600
X601
X3
X1
-UB1-UB2
PSPE
4 x E1 internal
Front cabling
SDSL Repeater