TS Supplement (Includes RFC-1006 Support)

CR-TPDU

TPDUs Used by RFC-1006

107751 Tandem Computers Incorporated 5–5

TPDU Size

When identifying the TPDU Size, the values are as follows:

Value TPDU Size

0001 0000 65531

0000 1111 32768

0000 1110 16384

0000 1101 8192

0000 1100 4096

0000 1011 2048

0000 1010 1024

0000 1001 512

0000 1000 256

0000 0111 128

Additional Option Selection

When identifying the Additional Option Selection, if bit 1 is 1, transport

ED transfer service is used; if bit 1 is 0, transport ED transfer service is not

used.

User Data

Up to 32 octets of transport user data are permitted in the CC-TPDU.

CR-TPDU Connect Request (CR) TPDUs, when used with RFC-1006, are different from OSI/TS

CR-TPDUs in the following ways:

RFC-1006 permits you to negotiate a much larger DT-TPDU size (up to 65531

octets).

RFC-1006 permits you to negotiate the use of transport expedited data transfer

service. This information is contained in the Variable Part field.

RFC-1006 permits you to transmit up to 32 octets of User Data.

The format of the RFC-1006 CR-TPDU is shown in Figure 5-3: