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442 CHAPTER 26: LAPB AND X.25 CONFIGURATION COMMANDS
adapt this change. Please consult your ISP to learn if the network supports this
function before deciding on whether the alias function is enabled or not.
For information about x.25 alias, refer to “x25 alias-policy” on page 441.
Example # Configure the link-layer protocol on interface Serial2/0 as X.25 and its X.121
address to 20112451, and set two aliases with different match types for it.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] link-protocol x25
[Sysname-Serial2/0] x25 x121-address 20112451
[Sysname-Serial2/0] x25 alias-policy right 20112451$
[Sysname-Serial2/0] x25 alias-policy left $20112451
With the above configurations, a call whose destination address is 20112451 can
be accepted as long as it can reach the local X.25 interface Serial2/0, no matter
whether the network is performing the prefix adding operation or suffix adding
operation.
x25 call-facility
Syntax x25 call-facility facility-option
undo x25 call-facility facility-option
View Interface view
Parameter facility-option: User facility option, including:
Table 65 Description on the user facility option
Option Description
closed-user-group group
number
Specifies a closed user group (CUG) number for the X.25
interface. The facility enables DTE to belong to one or more
CUGs. CUG allows the DTEs in it to communicate with each
other, but not to communicate with other DTEs. The group
number is in the range 0 to 9999.
packet-size input-size
output-size
Carries out maximum packet size negotiation in initiating call
from the X.25 interface. Maximum packet size negotiation is
part of flow control parameter negotiation. It needs two
parameters: maximum input packet size and maximum output
packet size, which must range from 16 (inclusive) to 4096
(inclusive), and must be the integer power of 2.
reverse-charge-request Carries reverse charging request when initiating calls from the
X.25 interface.
roa-list roa name Specifies an ROA list name for the X.25 interface. The roa name
is a string of 1 to 19 characters.
send-delay delay-time Carries out the maximum network send delay negotiation
when initiating calls from the X.25 interface. The delay time is
in the range 0 to 65534 ms.
threshold input-value
output-value
Specifies throughput negotiation values for initiating calls from
the X.25 interface. The values of input/output can only be 75,
150, 300, 600, 1200, 2400, 4800, 9600, 19200, and 48000.