Nokia MW1122, T66520 user manual Point-to-Point Tunneling Protocol Pptp

MW1122 supports both G.992.1 and G.992.2 ADSL recommendations defined by ITU-T.

Rate adaptation is done in steps of 32 kbit/s. The ADSL interface of MW1122 functions completely automatically and all configuration related to the ADSL connection is done at the access multiplexer in the operator’s premises. The network operator can set the data rates as a part of the network management functionality provided by Nokia

DSLAM.

4.7Point-to-Point Tunneling Protocol (PPTP)

When PPTP local tunneling is used, a local network client initialises a PPTP-tunneled PPP connection (VPN) to Nokia MW1122. The modem terminates the tunnel and all data from that terminated local PPTP tunnel will be forwarded to an assigned ATM VCC by using PPP over AAL5 encapsulation. Thus, each local PPTP tunnel requires an equivalent ATM VCC assigned to it restricting the total number of local PPTP hosts to 8.

Local tunneling is used when there is a need to have one or more computers connected independently to different networks. For example, in remote work application, the rest of the family may be using the common ISP services and one or two family members need to gain access to their corporate networks. With local tunneling, these remote workers may be connected to a different network than the rest of the users.

Local tunneling is activated using the PPTP client running, for example, in Windows The destination IP address must be MW1122 LAN/WLAN/VBRIDGE IP address depending on the configuration.

PPPpackets within PPTP are mapped to the configured VCC. MW1122 has three different ways to choose the ATM VCC that will be used for tunneling:

DAutomatic, chooses the first free VCC

DChooses the VCC number using C:number, where number is from 1 to 8. C:number is fed after the MW1122 IP address (see Figure 20).

DChooses the VCC number using N:name, where name is the VCCx description. N:name is fed after the MW1122 IP address.

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