Introduction to Tandem X.25 Capabilities

X25AM Parameters
065307 Tandem Computers Incorporated B–5
Table B-4 lists the X25AM parameters for optional user facilities. Optional user
facilities can only be applied to SVCs.
Table B-4. X25AM Optional User Facilities (Page 1 of 2)
Network
Subscription
Parameter
Possible
Values
Default
Values
SCF
Attribute
SYSGEN
Modifier Comments
Fast Select Enabled
Not enabled
Not enabled PTP EXTFORMAT Indirectly enabled by configuring
the line for extended format with
SYSGEN and configuring the
subdevice for the PTP protocol
with SCF.
Not available with 5701-X25EE
(Eastern Europe/China).
Reverse
Charging
Yes
No
No REVERSECHG — Configured per SU in SCF.
Requests reverse charging in
outgoing calls from the SU.
Accept
Charges
Yes
No
No ACCPTCHG — Configured per SU in SCF.
Accepts incoming calls with
reverse charging requested.
CUG
(Closed User
Group)
Supported None CUG — The CUG number is specified as
either a LINE attribute or an SU
attribute in SCF.
BCUG
(Bilateral
Closed User
Group)
Supported None BCUG — The BCUG number is specified
as either a LINE attribute or an
SU attribute in SCF.
Negotiation
of Window
Size, Packet
Size
Negotiate
Nonegotiate
Nonegotiate NEGOTIATE
NONEGOTIATE
— Configured per SU in SCF.
User can enable or disable
negotiation of window size,
packet size, and throughput
class.
Call Direction
with
Notification
Supported Enabled — — Provided by default. The
application can issue a procedure
call to obtain the reason.
Call Line
Address
Modified
Notification
Supported Enabled — — Provided by default. The
application can issue a procedure
call to obtain the reason.