Specifications

W5-Ethernet-Manual.doc
Version 2.0-01
Watson 5 Ethernet
Operating Manual
Revision: 2006-04-27 3-9
Jumper Configuration Wetting Current Function
(no jumpers) Wetting current off
(two jumpers) Wetting current source
(one jumper) Wetting current sink
Table 3-3: Wetting current jumper settings
The Watson 5 Ethernet tabletop modems cannot source wetting current. It will always sink wetting
current when local powering is used.
3.1.7 Master / Slave
To start up a DSL link, one system unit must be configured as master modem (STU-C) and the
other one as slave (STU-R). The master controls the link startup procedure. If both system units are
configured as master or as slave, no startup will occur.
Usually, the plugin is configured as master and the tabletop modem as slave (default setting). How-
ever, it is possible to set up a DSL link with two plugins or two tabletops, as long as one is config-
ured as master and the other one as slave.
3.1.8 DSL Clocking
Watson 5 Ethernet modems have a crystal controlled DSL clock that does not depend on the clock-
ing of the Ethernet user interfaces (clockmode 1 of TS 101 524).