Intermediate dispetching point PPDS-4

Scopes

• The capability to connect to the following communication lines: four-wire VF channel; four-wire physical line; two-wire physical line.
• Dispatch communication;
• Receiving of individual, group and conference call originating;
• Originating a “receipt” - a call confirmation signal in the form of a single-tone or coded signal containing the number of an intermediate point;
• Calling and communication in the following modes:  simplex - via a two-wire line; duplex - via a four-wire channel.
• Constant self-testing and self-tuning;
• The capability of connecting a remote ring (up to 220 V, up to 1 A) (included);
• Light indication of a call transmitted from the central station;

Composition

• PPDS-4
• A telephone with a push-to-talk switch;
• Fire alarm;
• Mains supply.

Technical parameters