7/21/2019 Skinny Call Control Protocol

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Skinny Call Control Protocol

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The Skinny Call Control Protocol (SCCP, or short Skinny) is a proprietary network

terminal control protocol originally developed by elsius ystems!

The ""# technology is now owned and defined by "isco ystems, $nc! as a messaging

system between a kinny client and the "isco "all%anager ! &'amples of skinny clients

include the "isco ** series of $# phones, "isco $# "ommunicator  softphone and the

+*!--b wireless "isco *, along with "isco .nity voicemail server! kinny is a

lightweight protocol which allows for efficient communication with "isco "all%anager !/-0 "all%anager acts as a signaling pro'y for call events initiated over other common

 protocols such as 1!22, $#, $34 and5or %6"#!

The Internet Protocol Suite

Application Layer

76# · 31"# · 34 · FT# · 6T# · 1TT# · $%8# ·

$9" · %egaco · %6"# ·  44T# ·  4T# · ## · 9$# ·9#" · 9T# · 9T# · 3# · $# · %T# · 4%# ·

8# · 1 · Telnet · T;5; · <%## · (more)

Transport Layer

T"# · .3# · 3""# · "T# · 9=# · &"4 · (more)

Internet Layer

$# ($#v>, $#v?) · $"%# · $"%#v? · $6%# · $#sec ·

(more)

Link Layer

89#5$n89# ·  43# · #F · Tunnels (;T#) · ### ·

%edia 8ccess "ontrol (&thernet, 3;, $34,

F33$) · (more)

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Contents

/hide0

• - #rotocol components 

• rigin 

• 2 ther implementations 

• > ee also 

• A 9eferences 

• ? &'ternal links 

[edit] Protocol components

8 kinny client uses T"#5$# to communicate with one or more "all %anager

applications in a cluster! $t uses the 9ealBtime Transport #rotocol (9T#) over .3#B

transport for the bearer traffic (realBtime audio stream) with other kinny clients or an1!22 terminal! ""# is a stimulusBbased protocol and is designed as a

communications protocol for hardware endpoints and other embedded systems, with

significant "#. and memory constraints!

[edit] Origin

"isco acCuired ""# technology when it acCuired elsius "orporation in -+!/0 8s a

remnant of the elsius origin of the current "isco $# phones, the default device name

format for registered "isco phones with "all%anager is &# BB as in Selsius Ethernet

 Phone BB followed by the %8" address! "isco also has marketed a kinnyBbasedsoftphone called "isco $# "ommunicator!

[edit] Other implementations

ther companies like ymbol Technologies, ocket$#, and 3igium have implemented

this protocol in =o$# Terminals (phones), %edia 6ateway "ontrollers, and oftswitches!

8n open source implementation is available in the 8sterisk (#7<) system! $#7lue/20 

markets a software phone (soft phone) which uses ""# for signaling and emulates a

"isco ?* hardware phone!

[edit] See also

7/21/2019 Skinny Call Control Protocol

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• =oice over $nternet #rotocol 

[edit] Reerences

-! ! "all states sent to ""# endpoints by "isco "all%anager  

! ! "isco ystems acCuisition of elsius ystems 

2! ! http:55www!ipblue!com5 $#7lue

[edit] "#ternal links

• kinny "all "ontrol #rotocol (""#) B "isco ystems 

• kinny "all "ontrol #rotocol (""#) B Fragment of a =o$# course dealing with

""#, with sample captures