Filter
Top Products
SVC
Enables or disables switched virtual circuits (SVCs).
Default: Yes
No
Disables switched virtual circuits.
Yes
Enables switched virtual circuits. When SVC is enabled, the Low SVC LCN and High
SVC LCN parameters take effect.
T1
Sets the T1 time interval, in tenths of a second, determining how long a frame can
remain unacknowledged.
Default: 30
Range: 1 to 9999
Typically, a T1 value in excess of three seconds is required only if your network
connection has a substantial path delay (for instance, if the connection is
accomplished with a satellite link). Under these conditions, T1 must have a value
greater than the round-trip frame-transmission time, plus the time required to process
the frame at the receiving end.
Note: If the T1 value is too small, throughput is reduced because of needless
retransmittal of frames. If T1 is too large, X.25 takes an excessive length of time to
detect lost frames.
Enter the T1 timer value, taking note that the timer is expressed in tenths of seconds
(for example, a value of 30 sets the timer to 3 seconds). The value of T1 must be the
same for both ends of the link.
Upper Circuit Name
Identifies a “software circuit” or “pipe” providing the interface between a protocol
suite (for PDN, this is TCP/IP) and X.25 packet-level services. The upper circuit
provides an interface between the upper layer protocol and X.25 network services.
The lower (LAPB) circuit, in contrast, provides an interface (via a device driver)
between X.25 network services and the X.25 service provider.
X.121 Address
Accepts the X.121 address corresponding to IP Address.
X.25 Service Parameters
Parameters and Options
13-12