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E Copyright Nokia Networks Oy
C33907001SE_00
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Application Layer Gateway functionality (ALG). M1112 has ALG for
the following protocols/applications:
D ICMP
D FTP
D H.323 including NetMeeting
D CUSeeMe
D PPTP
D IRC
D IPSEC ESP tunnel mode and IKE
Note, that most IPSEC implementations will fail when passed through
NAPT. A typical reason is that the identification may fail if the
identification is based on IP address. Also, only tunnel mode without
Authentication Header (AH) works.
2.2.5 Dynamic Host Configuration Protocol
M1112 can act as a Dynamic Host Configuration Protocol (DHCP)
server for the PCs on the end-user home network. In this mode, M1112
can assign up to 253+253 consecutive addresses from two separate
address ranges (that is, 253 consecutive addresses per address range)
to the PCs on the home network. Two separate address ranges can be
used if more than 253 addresses are required on the local subnet, if two
non-contiguous ranges are needed or if an additional router with
DHCP relay is used on the local network. M1112 can also act as a
DHCP relay agent and relay the DHCP requests to an external DHCP
server.
2.2.6 ATM and ADSL
M1112 supports up to 8 simultaneous VCCs and supports UBR
(Unspecified bit rate) traffic shaping on all VCCs. The maximum
transmit rate on each VCC is the ADSL upstream capacity. If more
than one VCC is transmitting simultaneously, the ADSL upstream
capacity is temporarily shared between these VCCs. When one VCC is
idle, the bandwidth is used by another VCC.
The ADSL transmission is based on the DMT line code. M1112
provides a DMT line rate up to 8 Mbit/s downstream and up to 800
kbit/s upstream. The DMT transceiver is rate adaptive and capable of
providing faster rates over short distances or slower rates over long
distances. The transceiver adapts itself to the line conditions.
M1112 is compatible with ETSI 101 388.