3270 Exchange Station Identification (Sdlc Only); 3276 Terminal Identification; 3276 Sdlc Station Address - IBM 3270 Manual

3270 Exchange Station Identification (SDLC Only)
3276 Terminal Identification
3276 SDLC Station Address
4
The Exchange Station Identification (XID) number described below should be added to
the host programs for a 3276 attached to a switched network, but the XID is not critical
when the 3276 is attached to a nonswitched network.
Bits Meaning
0-3 ID format B'OOOO'
4-7 PU type B'OOlO'
8-15 Self-description X'OO'
16-27 X'Ol8'
28-47 Terminal ID number
Each terminal operating under synchronous data link control (SDLC) has a permanent,
unique, 6-byte identification that it will transmit in response to a request for its ID (XID
command). This identification, described below, is fixed at the time of manufacture and
is not selectable.
Bits 28-47 of the Exchange Station Identification are a unique Terminal ID that can be
obtained from the seven digits either shown in the Machine History list supplied with the
3276 or engraved on the side frame of the 3276. These seven digits are the machine serial
number and should be converted into the proper Station ID as follows:
l. The first two digits of the machine serial number should be 00, 23, 55, or 82. Each
number should be converted into the following bits:
Bits 28-31
00, 23 B'OOOO' or X'O'
55 B'l 100' or X'C'
82 B'l 111' or X'F'
2. The remaining five digits can be converted into bits 32-47 by use of the IBM System
Reference Card, GX20-1850 or GX20-1703.
Example: If the seven digits of your machine are 00-15623.
Bits
28-31 B '0000' or X'O'
32-47 B'OOll 110100000111' or X'3D07'
Complete Terminal ID is X'020001803D07'
_ _ .... L . . - -
Fixed Variable
The SDLC station address is a 1-byte address that must be selected by the customer at
setup time.
An SDLC Station address of either X'OO' or X'FF' should not be assigned.
Note: The SDLC station address must correspond to the address selected by Host
Programming Support (NCP generation).