The call set-up and clearing packets contain an address block. This address block has two possible formats:
bit 8 of GFI
A-bit |
||
non-TDA/NZI address format | 0 | short address format |
TOA/NPI address format | 1 | long address format |
When this facility is subscribed to, the DCE and the DTE shall always use
the TOA/NPi address format. ie, the network will always use the long address
format of the call set-up and clearing packets transmitted from the network.
Whether or not this facility is subscribed to the DTE is permitted to use
either long address format (if supported by the network) or short address format.
Long addresses are intended to allow interworking with ISDN networks, see,
CCITT X.31
E.164 - 12 digit and 15 digit numbering plan
E.165 -
E.166 -
X.2 LEVEL 3 PER USER SUBSCRIPTION | X.2 (1984) | UK(a) | UK(b) | interworking | |||
OPTIONS | REF CLASS | now | now | R5a | R5b | R6 | |
TOA/NPI address options | . | . | . | . | . |
| TOA/NPI address options.............| | . | . | . | . | . | | #UK(a) - not supported
UK(b) - not supported
\info\computer\UK\x25-sub\adr-t.t1
.if &UKa& = y
_UKa support_
DX1: no
DX2: no
TP4/III: ?
not supported in release 4