Innovaphone IP1200, Руководство администратора

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page 28 innovaphone IP DECT
net or other networks operated with the IP protocol.
PPTP connections are always dial-up connections. An IP address is dialled. Au-
thentication is performed by means of user name and password. In addition, the
transferred voice data can be encrypted with MPPE (
M icrosoft P oint-to- P oint E n-
cryption). The prerequisite, however, is that the remote party also supports this
method. If MPPE was enabled, this may result in a delay in voice transmission.
If quality losses of this kind occur, a decision has to be made between security
or voice quality.
The innovaphone devices can dial into a remote PPTP server as a PPTP client,
as well as provide a dial-in point themselves.
ISDN section:
Server
Address The IP address of the PPTP server. If the device itself is to play
the role of a PPTP server, then no IP address has to be entered
here.
Route to
Interface Here, connection setup inquiries can be forwarded directly to a
particular interface. For example: ETH0-1, PPP0-31.
Enable
MPPE
Encryption Enables the Microsoft Point-To-Point Encryption Protocol. MPPE
(RFC 3078) uses the RSA RC4 algorithm.
Stateless
Operation Here, the key is modified after every transferred packet.
40-Bit
Encryption Enables the encryption with a 40-bit session key.
128-Bit
Encryption Enables the encryption with a 128-bit session key.
Link Confi-
guration The ISDN interface configuration can be performed here. The
PPP interface can be configured here for inbound and for out-
bound calls.
Link type Four different link types can be selected.
Singlelink (64k) - A connection via a B channel.
Multilink (128k) - A connection via two bundled B channels.
Provides double the transmission speed.
Permanent B1 - Uses the B1 channel exclusively.
Permanent B2 - Uses the B2 channel exclusively.