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53
If both ends are Master-Master or Slave-Slave, the connection will be unstable: errors and/or Unlocked
alarms. The element management may report "Communications Error" when using the web browser.
Note. If a chain contains several iPasolink sites and the intermediate site is using a single IDU (two modems
per IDU), then the first IDU of the chain on the core network side should be Master and all the other IDUs
Slaves synchronized to the modem towards the Master. In this case there are several Slaves connected to
each other, but the timing is nevertheless derived indirectly from the Master IDU.
SETTINGS WITHOUT THE CLOCK CARD –OPTION
Without the Clock Card –option the setting is very simple, see Fig. 37-38. Three alternatives are available
Internal / MODEM/ Auto. Select Internal (= MASTER) at the other IDU and Modem (=SLAVE). Chain of IDUs;
see the note above. Element setting.
Figure 37. Slave setting without the Clock Module
Auto setting is used for the slave e.g. in a ring in order to select the clock automatically from the two
directions.
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