DLC_START_LS

DLCQLLC supports up to 255 concurrent link stations (LS) on a single SAP.

Each active link station becomes a virtual circuit. The actual number of possible link stations may be less than 255, based on the number of virtual circuits.

The ioctl subroutine argument structure for starting an LS, dlc_sls_arg, has the following specifics:

• The following common link station flag is not supported:

  Item	Description
  ADDR	The address indicator flag is ignored.

• The raddr_name (remote address) field is used only for outgoing calls when the DLC_SLS_LSVC common link station flag is active. Two formats are supported:
  • For a switched virtual circuit, the raddr_name field is the remote's network user address (NUA), encoded as a string of ASCII digits.
  • For a permanent virtual circuit, the raddr_name field is the logical channel number, encoded as a string of ASCII digits prefaced by the lowercase letter p or an uppercase P.
  Examples of valid remote addresses are:

  Item	Description
  Switched Virtual Circuit	23422560010502
  Permanent Virtual Circuit	P13

• If the CCITT attribute is set to 1980 when configuring the X.25 adapter, the rcv_window (maximum receive window) field can be set to any value from 1 to 7. If the CCITT configuration attribute is set to 1984, the rcv_window field can be set to any value from 1 to 128.
• If the CCITT attribute is set to 1980 when configuring the X.25 adapter, the xmit_wind (maximum transmit window) field can be set to any value from 1 to 7. If the CCITT configuration attribute is set to 1984, the xmit_wind field can be set to any value from 1 to 128.
• The RSAP (remote SAP) field is ignored.
• The RSAP low (remote SAP low range) field is ignored.
• The RSAP high (remote SAP high range) field is ignored.
• The repoll time field is defined in increments of 1 second.
• The ack_time (acknowledgment time) field is ignored.
• A protocol-specific data area must be appended to the generic start link station argument (dlc_sls_arg).