559556
70
Zoom out
Zoom in
Previous page
1/75
Next page
70 NetWAYS/ISDN – Glossary
structure of data transport for a variety of networks. These
standards are primarily intended to provide interoperability,
ensuring that different manufacturers’ devices with different
sets of features can communicate by a uniform method. PPP
over ISDN is specified in RFC 1618.
Ports
TCP and UDP packet headers provide port numbers for
source and destination, in addition to the IP addresses.
Because computers run many networking applications with
many simultaneous connections, the IP address is not suffi-
cient to address data to a specific application and a specific
communication process. For outgoing requests and replies,
the operating system assigns an application a unique TCP or
UDP port number, choosing one sequentially or randomly. In
NetWAYS/ISDN’s IP masquerading module, source port num-
bers are mapped to connections.
“Well-known ports” are destination port numbers that are re-
served for common network services and applications by
IANA, the Internet Assigned Numbers Authority. Well-known
ports are in the range from 0 to 1023.
Short-Hold Mode
Short-Hold Mode refers to the physical interruption of idle
ISDN connections after a specified delay. Connection charg-
es accrue for physically active ISDN connections (an occu-
pied B channel), regardless of whether or not data are actu-
ally being transferred. Because an ISDN connection can be
dialed up very quickly (in 1 to 2 seconds), it makes sense to
clear down the physical ISDN connection temporarily when
no data is sent for a certain time. The logical ISDN connec-
tion is maintained in accordance with the configuration set-
tings. As soon as new data is queued for transmission, the
physical connection is dialed up again in the background.
This mechanism is transparent to the network user.
netways-e.book Seite 70 Freitag, 28. November 2003 3:51 15
70


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for AVM NetWAYS-ISDN at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of AVM NetWAYS-ISDN in the language / languages: English as an attachment in your email.

The manual is 1,35 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of AVM NetWAYS-ISDN

AVM NetWAYS-ISDN User Manual - German - 81 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info