For the purposes of this chapter, when any of the following words or terms are used herein they shall have the meaning or construction ascribed to them in this section:
"Advanced Service" means any telecommunications service with or without dynamic bandwidth allocation, such as but not limited to ISDN Primary Rate Interface (PRI), which, through the use of a DS-1, T-1 or other un-channelized or multi-channel transmission facility, is capable of transporting either the subscriber's inter-premises voice telecommunications services to the public switched network or the subscriber's 9-1-1 calls to the public agency. As used in this section, "dynamic bandwidth allocation" means the ability of the facility or customer to drop and add channels, or adjust bandwidth, when needed in real time for voice or data purposes. As used in this section, "DS-1, T-1 or similar un- channelized or multi-channel transmission facility" means a facility that can transmit and receive a bit rate of at least 1.544 megabits per second (Mbps).
"Board" means the Chicago Emergency Telephone System Board created by this chapter.
"Department" means the department of finance of the City of Chicago.
"Executive director" means the executive director of the city's office of emergency management and communications, responsible for the management and control of the city's emergency telephone system.
"Regular Service" means any telecommunications service, other than Advanced Service, that is capable of transporting either the subscriber's inter-premises voice telecommunications services to the public switched network or the subscriber's 9-1-1 calls to the public agency.
"Trunk line" means a transmission path, or group of transmission paths, connecting a subscriber's Private Branch Exchange ("P.B.X.") to a telecommunications carrier's public switched network. In the case of Regular Service, each voice grade communications channel or equivalent amount of bandwidth capable of transporting either the subscriber's inter-premises voice telecommunications services to the public switched network or the subscriber's 9-1-1 calls to the public agency shall be considered a trunk line, even if it is bundled with other channels or additional bandwidth. In the case of Advanced Service, each DS-1, T-1 or other un-channelized or multi-channel transmission facility that is capable of transporting either the subscriber's inter-premises voice telecommunications services to the public switched network or the subscriber's 9-1-1 calls to the public agency shall be considered a single trunk line, even if it contains multiple voice grade communications channels or otherwise supports two or more voice grade calls ("VCG") at a time; provided, however, that each additional increment of up to 24 voice grade channels of transmission capacity that is capable of transporting either the subscriber's inter-premises voice telecommunications services to the public switched network or the subscriber's 9-1-1 calls to the public agency shall be considered an additional trunk line.
Any other word or term not defined herein but defined in the Emergency Telephone System Act of the State of Illinois shall have the meaning ascribed to the word or term in that act.
In this chapter, unless the context otherwise requires, words in the singular number include the plural, and in the plural include the singular; words of the masculine gender include the feminine and the neuter; and when the sense so indicates, words of the neuter gender may refer to any gender.
(Prior code § 189.1-2; Added Coun. J. 12-6-89, p. 9623; Amend Coun. J. 9-10-97, p. 51631; Amend Coun. J. 12-4-02, p. 99026, § 8.5; Amend Coun. J. 11-18-09, p. 76000, § 1; Amend Coun. J. 11-16-11, p. 13798, Art. I, § 3; Amend Coun. J. 11-21-17, p. 61858, Art. III, § 1)