Envoy ACP/XF Application Programming Manual

System Procedure Call Specifics for EnvoyACP/XF
EnvoyACP/XF Application Programming Manual–132179
4-12
READ[X] Procedure
Bits 3-7 = Value specifies a command/response code for a U-frame. This
value causes EnvoyACP/XF to place the appropriate
command/response code into bits 0, 1, 2, 4, and 5 of the control
field of the U-frame. See Table 4-3.
Bits 8-15 = For point-to-point applications, the content of bits 8 through 15 is
zero.
For multipoint applications, the content of bits 8 through 15 is a
station index that refers to a tributary-station entry in the
DEFINELIST station list. In a supervisor application, bits 8
through 15 identify the tributary that sent the frame. In a multi-
address tributary application, bits 8 through 15 identify the
address of the particular tributary station to which the frame is
targeted.
Table 4-3. MCW Values for U-frame Command/Response Codes
MCW.<3:7>
Decimal Value
MCW.<3:7>
Octal Value U-Frame Command U-Frame Response
0 %00 UI UI
1%01SIM RIM
2 %02 nonreserved 0 nonreserved 0
3 %03 SARM (not supported) DM
4%04UP
7%07SABM
8%10DISC RD
10 %12 nonreserved 1 nonreserved 1
11 %13 SARME (not supported)
12 %14 UA
15 %17 SABME
16 %20 SNRM
17 %21 FRMR
18 %22 nonreserved 2 nonreserved 2
23 %27 XID XID
25 %31 CFGR
26 %32 nonreserved 3 nonreserved 3
27 %33 SNRME
28 %34 TEST TEST
31 %37 BCN