On Sip Performance

Internet Protocol (IP) telephony is an alternative to the traditional Public Switched Telephone Networks (PSTN), and the Session Initiation Protocol (SIP) is quickly becoming a popular signaling protocol for VoIP-based applications.

Practical Labs and a free SIP server

Setting Up Asterisk PBX System and Twilio, VestaCP, phpMyAdmin

Little House on the Prairie's fourth season, which premiered on September 12, 1977, proved to be the most successful in the series' run. Season four cracked the Nielsen Top Ten, and became the seventh-highest rated show of the 1977-78 television season, beating out mid-70s favorites such as M*A*S*H, Barney Miller, Soap, and The Love Boat. The most-watched episode in the series' history - the two part hanky-drowner "I'll Be Waving As You Drive Away" - garnered an Emmy nomination for Melissa Sue Anderson's harrowing portrayal of the blinded Mary Ingalls. The cast of Little House on the Prairie was on a roll in a season that, oddly enough, is all about change and a departure from the status quo. The fourth season sees the exit of beloved characters, the end of lingering storylines, the introduction of new friends, and some of the most startling plot developments to hit the series during its ten-year run.

In the fall of 1977, Victor French, who played the Ingalls' grizzled neighbor Mr. Edwards, left Little House to star in the ABC sitcom Carter Country. Strangely, the departure of Mr. Edwards (as well as his wife, postmistress Grace Snider-Edwards, and their adopted children Carl and Alicia), is never addressed. The family is simply gone from Walnut Grove (that is, until Carter Country was canceled and French returned solo). To replace Mr. Edwards, Michael Landon cast brawny Los Angeles Rams football star (and future FTD spokesman) Merlin Olsen as farmer Jonathan Garvey. Jonathan's wife, Alice (Hersha Parady), and young son Andy (Patrick Laborteaux) neatly fill the void left by the Edwards family: Alice serves as the town postmistress and Andy becomes a best friend to Laura (Melissa Gilbert).