Skip to content
Skip to search
Skip to footer
Cisco.com Worldwide
Products and Services
Solutions
Support
Learn
Explore Cisco
How to Buy
Partners Home
Partner Program
Support
Tools
Find a Cisco Partner
Meet our Partners
Become a Cisco Partner
Support
Technology Support
Synchronous Optical NETwork (SONET)
Technologies Digests
PPP in HDLC-like Framing
PPP over SONET/SDH
Support Documentation
All Support Documentation for this protocol
Technology Information
Technology Q&A
Technology White Paper