6

6. o cc giao din E1. (Theo chun ITU-T G703)

-Tt c cc card trung k E1 lp t ti DSLAM Hub trung tm v cc DSLAM ti Bo Lc, T Lng, Tr Lnh v Trng Khnh khng p ng c tiu chun ITU-T G.703 v mt n xung.

-Mt s hnh kt qu o kim ti tnh Cao Bng s dng My o Sunset E10 o lung E1

Hnh 3- Kt qu o lung E1 ti TX Cao bng

Hnh 4- Kt qu o lung E1 ti T Lng

Hnh 5- Kt qu o lung E1 ti Tr Lnh

Hnh 6- Kt qu o lung E1 ti Trng Khnh

Hnh 7- Kt qu o lung E1 ti Bo lc7. o kim kh nng cung cp dch v VPN.

7.1 Dch v VPN khng qua BRAS.

Cu hnh dch v VPN:PC1-> modem1 -> DSLAM -> modem2->PC2

- PC1: IP: 10.22.36.11/24

- Modem1:

Local: 10.22.36.1/24

WAN: 11.11.11.2

Type: IPoA

- Modem2:

Local: 10.0.0.2/24

WAN: 11.11.11.1/24

Type: IPoA (or 1483 Routed IP LLC)

- PC2: 10.0.0.23/24

Tc bng thng thit lp:

1024 kbps

Tc bng thng download thc t: 754,14 kbps.

Hnh 8. Dch v VPN khng qua BRAS

7.2 Dch v VPN thng qua BRASCu hnh dch v VPN:PC1-> modem1 -> DSLAM1->BRAS -> DSLAM2->modem2->PC2

- PC1:

IP: 10.22.36.11/24- Modem1:

Local: 10.22.36.1/24

WAN: 192.168.1.2/24

Type: IPoA

-BRAS:

IP1: 192.168.1.1/24

IP2: 192.168.2.1/24

- Modem2:

Local: 192.168.12.1/24

WAN: 192.168.2.2/24

Type: IPoA (or 1483 Routed IP LLC)

- PC2: 192.168.12.10/24

Tc bng thng thit lp:

1024 kbps

Tc bng thng download thc t: 506,27 kbps.

Hnh 9. Dch v VPN thng qua BRAS5