User`s guide

4: ADCCP NRM Operations
DC 900-1317J 87
Before attempting to reconfigure a link that has already been configured, the client
must ensure that the link is disabled. When the client configures the link, all previously
assigned stations are automatically disassociated from the link and are available for
reassignment to that link or to any other inactive link.
4.1.2.2 Station Configuration
The client assigns stations to a physical link (see Section 3.4.20.2 on page 71) by using
the second variant of the
DLI_PROT_CFG_LINK packet (see Figure 3–2 on page 72). The cli-
ent must specify the
iProtModifier field, the link ID, and the usProtXParms[0] field (sta-
tion ID). The
iProtModifier field value must be 1. The client must also set the
usProtXParms[1] field (data size) equal to 16 and specify the station characteristics in the
data area within the control packet.
The data area in the control packet identifies configurable station characteristics. These
include ADCCP option selections enabled during station operation, the transmit win-
dow size, a selective reject (SREJ) threshold, and station address length and content for
local and/or remote secondary stations.
Stations 1–128 may be assigned to physical links as required for the user’s configura-
tion. The ICP uses the local and remote address specification fields to determine
whether a primary station or secondary station is being assigned to the link.
The address assignments are totally independent of the station ID specified in the con-
trol packet. The
usProtXParms[0] field (station ID) provides a convenient identifier that
both the client and the ICP use to exchange information and control on a logical station
basis. The local and remote station address fields in the data area of the
DLI_PROT_CFG_LINK packet are those actually used on the link. Each station address
defined on a link must be unique for that link.
The client configures a primary station by defining all remote secondary stations that
are on its polling list. That is, the client configures one or more remote stations on the
link by specifying the remote station address field length and content, and zeroing the