Identifies the network channel code for the T1 transport involved. The network channel code describes the channel provided by the provider from the customer's ACTL to a provider end office or access tandem.
NOTE 1: The format and structure of this field is defined in the ANSI approved standard, ATIS-0300223, Structure for the Identification of Network Channel (NC) and Network Channel Interface (NCI) Codes for Information Exchange or by COMMON LANGUAGE in BR-795-403-100. A brief summary of the format can be found in ATIS-0404000, Section 2.14.6.
VALID ENTRIES:
NC Code
NOTE 1: Valid CLLI Codes are maintained by Telcordia Technologies.
USAGE: This field is conditional.
NOTE 1: Required when the UNE field on the ASR form is not populated, the first position of the LTP field on the ASR Form is “B”, “C”, “D”, “E”, “L”, “M”, “P” or “Q” and the ACT field on the ASR Form is “N”.
NOTE 2: Required when the UNE field on the ASR form is populated, the first position of the LTP field on the ASR Form is “B”, “C”, “D”, “E”, “L”, “M”, “N”, “P” or “Q” and the ACT field on the ASR Form is “N”.
NOTE 3: Optional when the UNE field on the ASR form is populated, the first position of the LTP field on the ASR Form is “B”, “C”, “D”, “E”, “L”, “M”, “N”, “P” or “Q” and the ACT field on the ASR Form is “C”.
NOTE 4: Optional when the UNE field on the ASR form is not populated, the first position of the LTP field on the ASR Form is “B”, “C”, “D”, “E”, “L”, “M”, “P” or “Q” and the ACT field on the ASR Form is “C”.
NOTE 5: Otherwise prohibited.
DATA CHARACTERISTICS: 4 alpha/numeric characters
EXAMPLE: H C - D