Specifications

3-10
Reference Guide
Model No.
Running Head
Ringing Generators System Installation
Note:
There are two different types of 100W -48V Converters; one with full range and one
with limited. 8903 - 120V only, 8905 - 120/240V.
Figure 3-6. -48V Converter Fuse
3.5 Ringing Generators
The ringing generator provides a ringing voltage of 105 VAC (nominal) at 20 Hz for
simultaneously ringing 11 voice ports. If more than one ringing generator is required in the
same chassis, they must have the same model number.
Ringing Generators cannot be mixed
with 8906 and 890620 in a single chassis.
Make sure the system uses a -48V power source before installing any ringing generators. You
can install up to four ringing generators in a two-sided chassis, depending on the availability
of its slots. The front-loading chassis can have only one ringing generator each.
When two or more ringing generators are used, the outputs of all ringing generators are linked
together by OR circuits on the ringing bus. One generator must be jumpered as the MASTER
and the others must be jumpered as SLAVEs. The master ringing generator then synchronizes
the ringing signals on the ringing bus. Refer to the system specification section in this manual
for the ringing generators.
Fuse
Handle
Power
Bus
Edge
Connector