Central Office Switch (CO means the switching entity within the public switched Telecommunications network, including but not limited to:
Limited access highway means a highway:
Access line means and be limited to retail billed and collected residential lines; business lines; ISDN lines; PBX trunks and simulated exchange access lines provided by a central office based switching arrangement where all stations served by such simulated exchange access lines are used by a single customer of the provider of such arrangement. Access line may not be construed to include interoffice transport or other transmission media that do not terminate at an end user customer's premises, or to permit duplicate or multiple assessment of access line rates on the provision of a single service or on the multiple communications paths derived from a billed and collected access line. Access line shall not include the following: Wireless telecommunications services, the sale or lease of unbundled loop facilities, special access services, lines providing only data services without voice services processed by a telecommunications local exchange service provider or private line service arrangements.
Central Office means a building or a space within a building where transmission facilities or circuits are connected or switched.
Electrical protection barrier means the part providing protection against any direct contact to the high voltage live parts.
Access Services refers to interstate and intrastate switched access and private line transport services.