cmangla

1. Obtain admin password (say ONTPW) of GPON ONT from Syrotech or MTNL
2. Obtain vlan id, PPPoE username and PPPoE password from MTNL.
3. Login to Syrotech ONT using admin/ONTPW (step 1), note the VLAN id, MTU and other parameters that are also needed in the new configuration.
4. In "WAN Configuration", select the working internet connection and switch "Mode" to "Bridge".
5. Inherit other parameters, such as VLAN id and MTU from before this change.
6. Tick "Turn off LAN DHCP" and select only the ethernet port you're not connected to, say port-2.
7. Connect ONT port-2 to WAN port of you ethernet router.
8. Use PPPoE on ethernet router using credentials obtained in step 2.
9. MTU setting may need adjustment. Check it on http://www.letmecheck.it/mtu-test.php

cmangla

1. Obtain dlink dsl-2520u modem. Set it to bridge mode (LLC) from the admin page. Set correct MTU, VPI & VCI.
2. Connect ethernet port of modem to WAN port of router.
3. Use PPPoE from ethernet router. Obtain username and password from Airtel.

cmangla

   WAN Connection

   The DSL WAN connection can be separated virtually into multiple channels by
   assigning different VPI/VCI in each Permanent Virtual Circuit (PVC). In
   each PVC you can also set the connection protocol to be PPP, Dynamic IP,
   Static IP or Bridge mode.

                           WAN Connection :  [PVC0]

   Connection IP Version

cmangla

     Advanced Help
     * Port Forwarding
     * QoS Setup
     * Outbound Filter
     * Inbound Filter
     * DNS Setup
     * VLAN
     * Firewall & DMZ
     * Network Tools

cmangla

     Setup Help
     * ADSL Setup
     * LAN Setup
     * 6RD Setup
     * Time and Date

   ADSL Setup
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   Setup Wizard