RING-GEN (Analog Ring Generator)
Issue 4 May 2002
10-1459555-233-123
RING-GEN (Analog Ring Generator)
All analog phones in DEFINITY Generic 1 cabinets must be provided with a
ringing voltage. The RING-GEN (Analog Ring Generator) MO is the device that
provides the ringing voltage for analog phones in a multicarrier or single carrier
cabinet system. In a single carrier cabinet system, the Analog Ring Generator
resides in the Power Distribution Unit (PDU), typically:
■ WP91153 (single carrier cabinets)
— Figure 10-86 on page 10-1460 shows the position of the WP-91153
PDU and illustrates that fuse F9 is used for the Analog Ring
Generator.
— Figure 10-87 on page 10-1461 shows the position of the fuses on
the WP-91153 PDU and describes how to replace a fuse.
■ 1217A (single carrier cabinets) has a ring generator slide switch on the
bottom of the unit:
— 20 Hz. for North American and international applications
— 25 Hz. for international applications
Each carrier contains its own Analog Ring Generator.
A ringing voltage generator failure means that no ringing occurs on analog
phones; however, digital and hybrid phones do ring. The ringing voltage is
monitored by the Tone-Clock (active, if duplicated) circuit pack. In an EPN made
up of single-carrier cabinets, the Tone-Clock monitors only the ringing voltage in
the carrier containing the tone clock.
NOTE:
If the TN2182 Tone-Clock is installed in the Processor Interface slot, the
ringing voltage is not monitored.
NOTE:
The TN2036 Voltage Range circuit pack provides easy access for testing
the various voltages on the backplane pins.
See ‘‘Replacing power supplies and fans’’ in Chapter 5, ‘‘Routine Maintenance
Procedures’’ for information about troubleshooting and replacing power units.
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run
1
1 Where P is an appropriate port network number determined via the Port field from the
Alarm or Error Log.
Full Name of MO
RING-GEN MAJOR test environment P Analog Ring Generator
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