DIVA T/A ISDN Modem User’s Guide ◆ Page 68
The DIVA Terminal Adapters Program forMacintosh
X.25 Tab
This tab allows you to configure X.25 settings. Note that this tab is visible only if the protocol
is set to ‘Mult iLink PPP’ and if ‘Ena ble Always On / Dynamic ISDN (AO/DI)’ is enabled.
The X.25 tab's default parameters are suitable for most configurations, but in some cases
(such as with certain X.25 long distance providers), you may need to modify them. Use the
table below as a guideline.
Parameter Description
X.25 Version There are two X.25 CCITT recommendations available for selection, ‘1984’ and
‘1988’. This information is provided by your Service Provider and should match the
X.25 recommendation supported on the switch you are connecting to.
Request
Reverse
Charging
Determines who is charged by the X.25 network for the call. Select ‘No’ to pay for
the call locally, or select ‘Yes’ to charge the remote DTE. Select ‘Yes’ only if the
remote system accepts reverse charging, otherwise the call may not be accepted.
Throughput
class
negotiation
Assigns a ‘Throughput Class’ for the virtual circuit. The Throughput Class specifies
the effective throughput of the virtual circuit in bits per second (bps). Effective
throughput may be limited by a number of factors such as level of link utilization,
network congestion, and host processing.
Select ‘Default’ to use the Throughput Class specified in your network subscription,
or select one of the values between 75 and 9,600 bps. If yo u select a ‘bps’ value, the
local and remote DTEs can negotiate to use a lower value on a per-call basis.