User guide

Telephony and Multimedia Services
72 1/1551-HSC 901 35/3 Uen C 2005-12-02
Figure 50 Base band Solution with External POTS Filter
8.1.3 Baseband Solution with External ISDN Filter
When implementing base band ISDN a splitter/filter is used and placed
before the IP DSLAM as shown in Figure 51 on page 73. Connected to the
IP DSLAM, the combined ISDN splitter/low–pass filter complies with ETSI
recommendations. In the network, the combined ISDN splitter/low-pass
filter is placed the same way as a traditional ADSL splitter – on the end-
user side of the IP DSLAM - connecting directly to the ADSL line, to the IP
DSLAM and to the local exchange, as shown below.