@zshan 

We have several VPN routers that can handle various PPTP connections:

TL-ER6120, 50 PPTP connections

TL-ER6020, 16 PPTP connections

TL-R600VPN, 16 PPTP connections

The availability of the product depends on the region you are located so I would contact your local support team to see if the device desired is available: link

Thanks. 

i found out that  Archer c9 version 1 router(we have this one) doesnot have vpn option but  Archer c9 version 5 does have vpn. Wanted to ask if this is perfect for small scale business to providee connectivity for pptp. I have found out in my region archer c9 version 5 is avaiable. 

@zshan 

The C9 would not be able to accept 20 users at the same time. I believe the VPN server has a limitation of up to 8 or 10 users concurrently.

@Tony 

Thanks for sharing very useful information. Can you please share the Device information which accept more vpn connection at the same time. I wonder in my regioin if that device is avaiable. 

@zshan 

Here is the device I believe will be what you are looking for: link

Here is your local support team if you would like to follow up with them for additional questions: link