[ Previous |
Next |
Contents |
Search ]
AIXLink/X.25 1.1 for AIX: Guide and Reference
CCITT-Specified Facilities to Support the OSI Network
The CCITT-specified facilities that support the OSI network include:
Calling Address Extension
The calling address extension facility has a variable parameter length. The Calling Address Extension Call Packet figure shows the call packet coding.
0 |
0xCB |
1 |
Number of bytes following |
2 |
Use |
Length of calling extension address |
3 |
Calling extension address (BCD) |
* |
|
where:
0xCB |
Specifies the calling address extension facility. |
Use |
Indicates the usage for the calling address extension. Valid values are:
00 |
Carry an entire calling OSI NSAP address. |
01 |
Carry a partial calling OSI NSAP address. |
10 |
Carry a non-OSI calling address. |
11 |
Reserved. |
|
Length of calling extension address |
Specifies the length of the calling extension address in bytes. |
Calling extension address |
Specifies the calling address extension. The value can be up to 40 decimal digits, coded in BCD. |
Called Address Extension
The called address extension facility has a variable parameter length. The following figure shows the call packet coding.
0 |
0xC9 |
1 |
Number of bytes following |
2 |
Use |
Length of called extension address |
3 |
Called extension address (BCD) |
* |
|
where:
0xC9 |
Specifies the called address extension facility. |
Use |
Indicates the usage for the called address extension. Valid values are:
00 |
Carry an entire called OSI NSAP address. |
01 |
Carry a partial called OSI NSAP address. |
10 |
Carry a non-OSI called address. |
11 |
Reserved. |
|
Length of calling extension address |
Specifies the length of the called extension address in bytes. |
Calling extension address |
Specifies the called address extension. The value can be up to 40 decimal digits, coded in BCD. |
Minimum Throughput Class
The minimum throughput facility has a parameter length of 1 byte. The Minimum Throughput Class Call Packet figure shows the call packet coding.
0 |
0x0A |
1 |
Calling minimum throughput |
Called minimum throughput |
where:
0x0A |
Specifies the minimum throughput class facility for quality of service negotiation. |
Calling minimum throughput |
Specifies the throughput class requested for data to be sent by the calling DTE. Valid values are:
0x07 |
1200 bits |
0x08 |
2400 bits |
0x09 |
4800 bits |
0x0A |
9600 bits |
0x0B |
19200 bits |
0x0C |
48000 bits |
|
Called minimum throughput |
Specifies the throughput class request for data sent from the called DTE. Valid values are the same as those for the calling minimum throughput class. |
End-to-End Transmit Delay Facility
The end-to-end transmit delay facility has a variable parameter length. The End-to-End Transmit Delay Call Packet figure shows the call packet coding.
0 |
0xCA |
1 |
Length (of the following area) |
2 |
Cumulative (transit delay in milliseconds, binary, high byte first) |
3 |
Cumulative (transit delay in milliseconds, binary, high byte first) |
4 |
Requested end-to-end (delay in milliseconds, binary, high byte first) |
5 |
Requested end-to-end (delay in milliseconds, binary, high byte first) |
6 |
Maximum acceptable (transit delay in milliseconds, binary, high byte first) |
7 |
Maximum acceptable (transit delay in milliseconds, binary, high byte first) |
where:
0xCA |
Specifies the end-to-end transit delay facility for quality of service negotiation. |
Length |
Specifies he number of values in the stream. Valid values are 1, 2, or 3, since requested end-to-end delay and maximum acceptable transit delay are optional. |
Cumulative |
Specifies the cumulative transit delay in milliseconds, coded in binary, high byte first. |
Requested end-to-end |
Specifies requested end-to-end delay in milliseconds, coded in binary, high byte first. |
Maximum acceptable |
Specifies the maximum acceptable transit delay in milliseconds, coded in binary, high byte first. |
Expedited Data Negotiation
The expedited data negotiation facility has a parameter length of 1 byte. The Expedited Data Negotiation Call Packet figure shows the call packet coding.
0 |
0x0B |
1 |
| | | | | |
| | | | | | |
A |
where
0x0B |
Specifies the expedited data negotiation facility. |
A |
Specifies one of the following values: |
0 |
No use of expedited data
|
[ Previous |
Next |
Contents |
Search ]