PTX
PTX is a pure P Router / Network Peering , has a limited feature set, High density port and low cost per port. For service provider "like" market.
The MX is the swiss army knife of Juniper ( P or PE-router )
Main Page: https://www.juniper.net/us/en/products-services/routing/ptx-series/
Documentation :
Datasheet:
PTX sharepoint:
PLM Product Library
https://junipernetworks.sharepoint.com/sites/plm/Pages/Forms/AllItems.aspx