Can I connect multiple devices to the MTNL router?

Submitted the form today and they have already taken 1000 cash from me. I wonder how much more will I be charged for the entire installation/setup process.
 
Here is the speedtest result. I have opted for the 512kbps and 1mbps plan. 512kbps from 8am to 6pm and 1mbps from 6pm to 8am.

https://www.speedtest.net

Line Stats: (The page keeps on auto refreshing and the values change by a small margin)

SNR Margin: Downstream 33.4 | Upstream 24.8 (in db)
Attenuation: Downstream 8.1 | Upstream 8.2 (in db)
 
A minimum SNR of around 6 dB is required for a stable sync at 1mbps, provided attenuation is reasonable. So anything > 30 is beyond awesome :D Attenuation < 20 is considered good ;)
 
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