Expand Configuration and Management Manual (H06.21+, J06.10+)
Expand Modifiers
Expand Configuration and Management Manual — 529522-013
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FLAGFILL_OFF/ FLAGFILL_ON
FLAGFILL_OFF/ FLAGFILL_ON
Default: FLAGFILL_ON
Units: Not applicable
Range: ON or OFF
These Layer 2 modifiers are applicable to direct-connect and satellite-connect Exp
and
line-handler processes only. The FLAGFILL_ON modifier causes a specific bit pattern
called FLAG to be set during the idle period for a line. You can use the FLAGFILL_OFF
modifier to cause bit-synchronous controllers to keep an idle line in the MARK HOLD
instead of the IDLE FLAGS state. Some modems and data circuit-terminating
equipment (DCE) require the idle line state to be configured with the FLAGFILL_ON
modifier.
FRAMESIZE n
Default: 132
Units: Words
Range: 64 through 2047
This Layer 2 modifier is applicable to all Expand line types. This modifier specifies the
maximum size frame that can be sent in the network; smaller frames can be sent. The
FRAMESIZE modifier is also used by the Expand subsystem to calculate the packet
size, which determines the size of the frame buffers.
The Expand subsystem calculates the packet size (in words) using this formula:
packet_size = FRAMESIZE - 4
If the default FRAMESIZE modifier value is used, the packet size is 128 words. The
FRAMESIZE modifier, packet size, and frame buffers are described in Section 17,
Subsystem Description.
INTERFACE_RS232/INTERFACE_RS422
Default: INTERFACE_RS232
Units: Not applicable
Range: ON or OFF
These communications hardware modifiers are applicable to direct-connect and
satellite-connect line-handler processes only
. The INTERFACE_RS232 modifier
specifies that RS-232 is the type of modem connected to the interface. The
INTERFACE_RS422 modifier specifies that RS-422 is the type of modem connected to
the interface.
Note. The line-handler FRAMESIZE value must be the same for every Expand line-handler
process on every node in the network. However, the FRAMESIZE modifier value specified for
the network control process ($NCP) must be equal to or less than the line-handler
FRAMESIZE, but it does not have to be the same on all nodes in the network.