Configuring and Managing Host-Based X.25 Links - Edition 6 (36939-90057)

Configuring DTCs Step-by-Step
Modify the Network Management Configuration File
Chapter 3
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6. If you are using the 1984 standard, verify that the cursor is in the Timer T3 field.
Enter the value for this timer as specified by your network subscription. If you are
using the 1980 standard, skip this field (press
[TAB]
to move to the next field).
7. Verify that the cursor is in the Retransmission count (N2) field. Enter the value
for the retransmission count as specified by your network subscription.
8. Verify that the cursor is in the Unacknowledged frame number (K) field. Enter the
value for the number of frames that can be transferred without acknowledgment as
specified by your network subscription.
9. Verify that the cursor is in the Modulo field. Enter the modulo value as specified by
your network subscription.
10. When you have entered all level 1 and 2 values as specified by your subscription,
press the
[Save Data]
key to save the configuration.
11. Press the
[Go To Level 3]
key to move to the DTC X.25 Card Configuration — Level 3
& Miscellaneous screen.
Fields You use this screen to configure X.25 level 1 and 2 parameters for the DTC/X.25
Network Access card being configured. You must define these parameters for both
X.25 system-to-system and PAD connections. Ranges for configurable values are
listed on the screen.
DTC Name Display only.
Card Number Display only.
Line speed The line speed for the connection. Supported speeds for a card
installed in a DTC16 are 1200, 2400, 4800, 9600, or 19200 bps.
Supported speeds for a card installed in a DTC48 or DTC72 are
1200, 2400, 4800, 9600, 19200, 48000, 56000, or 64000 bps.
Packet Switched Network Name The name of the network you subscribe to.
Possible network names include: DATAPAC, PSS, DATEX-P,
TRANSPAC, TYMNET, TELENET, DDN, HP PPN, ITAPAC,
LUXPAC, DATANET1, DCS, DCE, X25PDN. (The name must be
entered exactly as shown here.)
If two X.25 systems are directly connected (for example, if you have
a cable connecting one DTC X.25 card directly to another DTC X.25
card) one of the two systems must be configured as DCE and the
other as DTE. To configure a card as DCE, enter DCE in the Packet
Switched Network Name field. To configure a card as DTE, enter
X25PDN in the Packet Switched Network Name field. (Entering
DCE configures the X.25 card as a DCE at levels 2 and 3 of X.25. At
level 1 it remains DTE.)
CCITT X.25 Standard Version of the CCITT X.25 standard you are using, either
1980 or 1984.
Frame size (N1) The frame size, in bytes, as listed on your subscription. Note that
many network subscription forms give this value in bits, not bytes.
In such cases, divide the number of bits by 8 to obtain the correct
number of bytes to enter in this field.
Range: 23 to 4103 bytes.