for English Local Education Authorities and Regional Broadband Consortia, Scottish Local Education Authorities and National Agencies, and Welsh Unitary Authorities

After consideration of the views express by interested parties, the following E.164 numbering scheme will be operated for videoconferencing services provided to primary and secondary education throughout England, Scotland and Wales.

Structure of Addresses

The annexes to this document list the Local/Regional Prefixes that are currently assigned. Annex 1 lists those assigned to English LEAs and RBCs. Annex 2 lists the
prefixes assigned to Scottish LEAs and National Bodies. Annex 3 lists prefixes assigned to the Welsh Unitary Authorities.

Constraints on Assignment of Addresses

The above scheme is a total of 17 digits in length. The recommendation for the length of E.164 addresses by the ITU is also 17 digits. It is recommended that no more than this number of digits be used, to retain future compatibility with any future schemes developed within the ITU framework (e.g. the possible integration of  videoconferencing and voice telephony.) If an organisation nevertheless intends to use more than 17 digits, it is strongly recommended that before implementation it checks that its equipment can support E.164 addresses with more than 17 digits.

If the RBC scheme for the End-user assigned part of the address is not followed, implementers should note that it is recommended that the first digit of this part should
not be zero. This is because zero is sometimes used as an escape code in schemes that allow the End-user assigned part of the address only to be used in a local context (c.f. the use of telephone numbers within a local dialling area without the need to prefix it with the national dialling code).

Annex 1: Local/Regional Prefixes for English Local Education Authorities and Regional Broadband Consortia

Portability of Local/Regional Prefixes in England

The Local/Regional Prefixes have been assigned on a regional basis and in contiguous blocks. This is to facilitate their use by RBCs or other regional co-ordinating
organisations. The assignment and therefore block structure was made using the membership of the ten RBCs in May 2003.

If a LEA should leave a RBC, Janet reserves the right to require it to relinquish its Prefix, if in Janet’s opinion retention of the Prefix would cause operational
difficulties. In this event a new Prefix would be assigned to the LEA.

If a LEA should join a RBC, or transfer between RBCs, the same consideration will apply to any Prefix which it currently holds. The assignment of contiguous blocks has been made in a manner that allows a small number of additional Prefixes subsequently to be assigned to a regional block, should the need arise.

Annex 2: Local/Regional Prefixes for Scottish Local Education Authorities and National Agencies

Portability of Local / Regional Prefixes in Scotland

The Local/Regional Prefixes have been assigned on a consecutive basis. This is to facilitate their use by LEAs or other regional co-ordinating organisations. If a LEA
should leave the SSDN Interconnect, Janet reserves the right to require it to relinquish its Prefix, if in Janet’s opinion retention of the Prefix would cause

Annex 3: Local/Regional Prefixes or Welsh Unitary Authorities

Portability of Local / Regional Prefixes in Wales

The Local/Regional Prefixes have been assigned on a consecutive basis. This is to facilitate their use by (UA) Unitary Authorities or other regional co-ordinating organisations. If there are changes to the UAs, Janet reserves the right to require amendments to assigned Prefixes, if in Janet’s opinion retention of the existing Prefix would cause operational difficulties.

Any additional Prefixes subsequently required will be the next available prefix from the end of the current sequence.