FACILITIES
The following facilities and corresponding code formats are supported by the TA.
Reverse Charging: R
Reverse Charging is a facility analogous to “collect” calls. All connect charges are charged to the remote DTE. This facility works in conjunction with the Reverse Charging Acceptance facility. If the remote DTE does not subscribe to Reverse Charging Acceptance, the local DTE's call with the reverse charging request is cleared.
Format: R
Network User Identification (NUI)
This facility provides a way for the user to be identified by the network for the purpose of billing, security, or network management.
Format: N <NUI string>
A character string of up to 16 decimal characters from 33 to 126 of the ASCII character table (see Appendix F) except for characters 43 to 45 (hyphen, comma, and plus sign). Spaces can be included in the specification of the NUI string but are discarded by the PAD.
Echo to the local DTE is turned off upon entering the N until a comma or hyphen is entered. The comma signifies the end of the NUI string and indicates that more facilities are to follow. The hyphen signifies the ending of the facility block. The P or D designator used for the beginning of the user data call does not end the NUI string because it is considered a valid NUI string character.
Closed User Group (CUG)
The Closed User Group (CUG) facility permits users to essentially establish a private network on a public network by restricting communications to only those who are designated to be in the group. Access by anyone outside the group is denied. The CUG number is assigned by the network provider at subscription time.
Format: G <xx>
<xx>: two decimal digits ranging from 00 - 99. If two decimal digits are not specified, the response ERR displays.
UTA220/UTA220k |
