Identifies the network channel code for the circuit(s) involved. The network channel code describes the channel provided by the provider.
NOTE 1: The format and structure of this field is defined by ANSI in document T1.223, Structure and Representation of Network Channel (NC) and Network Channel Interface (NCI) Codes for the North American Telecommunications System. The Network Channel Code consists of the following elements:
1. Channel Service Code - Positions 1 and 2 describe the channel service
code in an encoded form. The channel service code will typically be specified
as the service code of the special service circuit or the transmission
grade of the message trunk
circuit. (2 alpha or 2 alpha/numeric characters).
2. Optional Feature Code - Positions 3 and 4 represent the option codes
available for each channel service code. Standard combinations of this
code will allow the customer to enhance the technical performance of the
requested channel, or to further identify the type of service. It is also
used to specify options such as conditioning, effective 4-wire, multiplexing,
etc.. (2 alpha or 2 alpha/numeric characters)
NOTE 2: If this field indicates that bridging is involved, the bridging location must be specified in the CKLT field.
VALID ENTRIES:
NC Code
NOTE 1: Valid NC codes are outlined in Telcordia Technologies practice BR 795-403-100.
USAGE: This field is conditional.
NOTE 1: Required when the ACT field on the ASR Form is "N", "C", or "T", otherwise optional.
DATA CHARACTERISTICS: 4 alpha/numeric characters
EXAMPLE: L G C B