System Functional Requirements of Plant Paging System

System Functional Requirements of Plant Paging System

1. The Contractor shall provide a fully digital, microprocessor controlled Central Exchange system employing interference-free communications. The system shall be capable of
   digital, duplex, hands-free voice communication at both calling and called party stations as well as digital control of features. Speech channels throughout the Central Exchange
   and the transmission lines shall be completely digital to and from each call station. The system shall utilize digital signal processor technology. The system shall be expandable
   through the addition of a second control cabinet, or a higher capacity alternate cabinet used in its place.
2. The system shall provide full feature station operation by means of a single twisted copper pair between the Central Exchange and each station. The maximum length of
   any given cable run shall be at minimum 2 km.
3. 3.3 The basic Central Exchange shall be modular and expandable. It shall be possible to network two or more Central Exchanges. The system shall have the capability to have Central Exchanges networked by utilizing fiber optic modems. The system shall also allow fiber optic modem connections for all station types equipped with an adapter.
4. There shall be at minimum 20 non-blocking links in a Central Exchange. There shall be at least 20 links between networked exchanges.
5. The system shall be capable of being networked by interconnecting Central Exchanges in a centralized or decentralized configuration to support the required number of speech channels as determined by the Contractor’s analysis. Networked exchanges shall retain the same full feature operation as non-networked exchanges without the necessity of additional equipment. The system shall be modular, rack mounted, and capable of supporting intercom/field stations as required by the Owner.
6. It shall be possible to partition a group of stations through software control and block calls between partitions to provide independent operation within partitions. It shall be possible to assign stations to a special partition, which allows access to all stations in all partitions.
7. Touch dialing extension sequences may be two (2), three (3) or four (4) digits according to preference or system size. Extension number sequence assignment shall be under program control and not require rewiring or setting of switches.
8. The system shall provide bi-directional serial data ports for external PC computer remote control of call features including call placement, call answering, system programming and modem interfacing. The external PC control shall utilize a Video Display Terminal, a Programmable Logic Controller, a Graphical User Interface, and security integration software.
9. The system shall have a multi-level call restriction capability to allow or deny access to features such as pre-empt, paging, and group call. Call restrictions shall be individually programmable for each station.

10 Master Station Functionality

• • Each master station (non-hazardous locations only) shall have the capability to provide plain English phrase Liquid Crystal Display (LCD) of feature-in-progress
    including, at least: BUSY, HOLD, TRANSFER, CONFERENCE, ALL-CALL, GROUP CALL, PAGE REPLY PROMPT, MESSAGE WAITING, CAMP-ON BUSY, CALLED
    and CALLING PARTY NAME ID, HELP MENU, NAME/NUMBER DIRECTORY, CALL FORWARD.
  • Each master station shall have the capability to display a unique directory of up to 20 frequently called extension numbers and names using a single key to scroll and a single key to dial displayed extension.
  • It shall be possible for a Master station to set up a conference call. Conference calls shall be available in hands-free loudspeaking mode. Handset stations in conference
    shall be in full-duplex mode. Simultaneous conference calls shall be supported. It shall be possible for any conferee to disconnect at any time. There shall be a display on the station LCD of each conferee showing the number of conference members.
  • Each master station shall have the capability to establish calls to other stations in two-way hands-free loudspeaking mode.
  • Each master station shall have the capability to camp-on when called station is busy and be answered automatically when the called station is idle. A busy station shall automatically place multiple camped-on stations in a prioritized queue and periodically alert busy station that calls are waiting.
  • Each master station shall have the capability to leave a message on the LCD screen at a called station, requesting a return call. A reminder tone shall periodically sound at the called station.
  • When a called station is busy, the calling master station shall have the capability to pre-empt (interrupt) an existing conversation. The pre-empted party shall be placed
    on hold and may be restored when the pre-empting conversation is terminated.
  • Each master station shall have the capability to emergency all-call or priority preempt page to all stations simultaneously with the ability to password protect this
    feature if desired.
  • Each master station shall have the capability to all-call or one-way voice page all non-busy stations simultaneously (including P.A. Page interface stations if so
    equipped).
  • Each master station shall have the capability to group call with reply to all non-busy members of any of nine groups per partition.
  • Each master station, which has been paged, shall have the capability to reply to the master station that initiated the All or Group Call by pressing a single key as
    prompted by station LCD message display.
  • When master stations are connected either party shall have the capability to place the other party on hold and restore the connection.
  • Each master station shall have the capability to place a call on hold, dial and connect to a third party and restore the original connection.
  • Each master station shall have the capability to transfer a call to another extension.
  • Each master station user shall have the capability to automatically redirect or  forward calls to a designated station.
  • Each master station in the full private mode shall have the capability to have their calls forwarded to a designated station when there is no answer at the station.
  • Each master station shall have the capability to call the last caller or redial the last  number dialed with a single key entry. Each master station shall have the capability
    to direct speed dial any extension with one or two digit dialing. One and two digit speed dial sequences shall be programmable by the user at each master station.
  • Each master station shall have the capability to select from four modes of station privacy: Automatic Loudspeaking Answer, Manual Answer, Full Privacy Ring and Do Not Disturb.
  • Each master station shall have the capability to adjust its voice and ring tone volume using digital volume control keys.
  • Tone signals shall be used to augment visual displays on station LCD displays for various functions including Call Pre-announce alert, Camp-on busy reminder, Message waiting alert, and Full Privacy ring.
  • Each master station shall have the capability to mute its local microphone for privacy by pressing a single key.
  • Each master station shall have the capability to manually control speech direction (Push-To-Talk) for noisy areas by pressing a single key.
  • Each master station shall have the capability to remotely activate a sub-station relay for control of doors or cameras.

11. The system shall be capable of including interfaces to allow each master station to access channels of programmed audio information sources.

12. The system shall be capable of including interfaces to allow each master station to access multiple voice page systems for paging through external amplifiers and overhead speakers.

13. The system shall be capable of including an interface to allow each master station to access a radio pocket page system to allow tone signaling and display annunciation on individual pagers.

14. The system shall be capable of including an interface to allow each master station to access a two-way radio system for two-way voice communications with groups of portable radios in accordance with FCC rules.

15. The system shall be capable of including an interface to allow each master station to receive or place telephone calls through a PABX.

16. Substations shall be capable of placing calls to designated master stations, other substations, and to administrative master stations by pressing a single button.

17.  Administrative master stations shall be capable of all features of a standard master station as well as the capability to store and display calls from substations, scroll and answer substation calls out of order and display multiple levels of substation call status. It shall be possible to program administrative master stations to operate in a parallel mode.

18. Access shall be restricted on a per-station basis for: All-call, Group Call, Partition, Preempt, Privacy and Emergency All-call through the program mode of a master station.

19. Time-out limits shall be programmable for paging, page reply, call ring, message tone interval and no-answer call forward. A pre announce tone shall be programmable on/off.