- Physical path
The physical path of the Programmable Serial Interface
(PSI) card.
The basic formula for deriving the physical path is 4
x slot number. (Example: 4 x 10 = 40.) For systems with
dual card cages, you must also specify a path number for the card
cage, as follows:
PathNumber/(4 X SlotNumber)
where (a) PathNumber is a number corresponding
to the card cage the PSI is in:
Card cage 0: PathNumber = 2
Card cage 1: PathNumber = 6
(b) / is the slash character (not the division sign), (c)
the parentheses are used to set off an arithmetic formula (they
are not entered as part of the Physical Path value), (d) X is the
multiplication sign (not the character X), and (e) SlotNumber is
the number of the slot, within the card cage, the PSI is in.
Examples:
If the PSI is in card cage 0, slot number 4, the Physical
Path is 2/16
(PathNumber, slash character, 4 multiplied
by 4).
If the PSI is in card cage 1, slot number 3, the Physical
Path is 6/12
(PathNumber, slash character, 4 multiplied
by 3).
If you are unsure of the slot location or of the physical
path number to configure for your system, see your system documentation
or consult your Hewlett-Packard service representative.
- Connect timeout
(HP modifiable.) During link
initialization, this value specifies the amount of time the PSI
will wait for a response from the remote station. If this time lapse
is exceeded, it is assumed that the remote station is not responding.
Default value: 900
Range: 60-900 seconds or 0 (0 means disabled)
- Local timeout
This is a handshake sequence between the host and
its PSI card. It is useful to prevent the PSI card from keeping
a line up when the system goes down.
Default value: 60
Range: 30-900 seconds or 0 (0 means disabled)
- Modulo count
This parameter specifies a window representing the
number of frames that can be outstanding.
Default value: 8
Range: 8 or 128
- LAP-B parameter T1
(HP modifiable.) Response
timeout in hundredths of a second. This is the maximum amount of
time that the transmitter should wait for an acknowledgment before
initiating a recovery procedure. This delay must account for three
frame transmissions and two frame-processing delays. An approximation
of this value is three seconds for line speeds greater than or equal
to 9600 bits per second and four seconds for line speeds less than
9600 bits per second.
The formula for the approximation in hundredths of a second
is the following:
400 x [(buffer size x 8)/line speed]
The configuration validation program will issue a warning
if the set value does not comply to this specification.
Default value: 300
Range: 5 to 1200 hundredths of seconds or 0 (0 means disabled)
- LAP-B parameter K
(HP modifiable.) This parameter
specifies the maximum number of sequentially numbered frames that
the configured node may have unacknowledged at any given time. This
parameter is also called the Level 2 window size.
Default value: 7
Range: 1-7 if modulo count=8; 1-127 if modulo
count=128
- LAP-B parameter N2
(HP modifiable.) This field
specifies the maximum number of times to retransmit a frame if the
T1 timer expires. The recovery procedure mentioned in LAP-B parameter
T1 usually refers to the retransmission of the oldest unacknowledged
frame. The value of N2 specifies the total number of times that
the T1 timer expires and a frame is retransmitted in determining
that the other side is not responding.
Default value: 20
Range: 1-255 retries
- Buffer size
Layer 3 through 7 frame size. This is the amount
of data that a user of OSI Levels 3 through 7 can put in that frame.
It does not include Level 2 header or trailer information. This
parameter is used to configure memory buffers.
Default value: 1024
Range: 32-1024 Bytes
- Local mode
If the node you are configuring is a Hewlett-Packard
computer operating across a point-to-point link, enter 11 (the default).
HP computers at both ends of a point-to-point link must both be
configured as HP point-to-point. If the remote node is a non-HP
node and the local station is acting as DTE, enter 5. If the remote
node is a non-HP node and the local station is acting as DCE, enter
6. If the node you are configuring is DCE, then the node at the
other side must be DTE. If the node you are configuring is DTE,
then the node at the other side must be DCE.
Default value: 11
Range: 5 = DTE, 6 = DCE, 11 = HP Point-to-Point
- Transmission speed
This is the line-transmission speed in bits per
second. It may be overridden by whichever device is providing clocking.
The PSI simply transmits using the provided clock source, whether
it is the HP 3000's CPU clock or a modem.
Default value: 56000
Range: 1200, 2400, 4800, 9600, 19200, 38400, 56000, or 64000
bits/second
- Trace at startup
(HP modifiable.) Enter Y
(YES) to enable link tracing at link startup, N
(NO) otherwise. This value can be overridden with the LINKCONTROL
command.
If you do enable link tracing, you are required to enter a
trace file name. For best performance, do not enable tracing.
Default value: N
- Trace file name
(HP modifiable.) Required
if link trace is enabled. Name of the disk file where you want to
record tracing. Must be a valid file name. Enter the file name in
the format filename.groupname.acctname.
The fully qualified file name can be as many as 26 characters.
Lockwords are not allowed for trace files.
Do not specify the same file name with the NMMGR configuration
as specified with the LINKCONTROL command.
Only one active trace is allowed per link.