Controller & service module

Answered Question
Dec 7th, 2008
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what is a controller & service module ?

and what is the functional difference between them ?

Correct Answer by Giuseppe Larosa about 8 years 7 months ago

Hello Abijit,

in a WAN router a controller controls an hardware resource like an E1/T1 or DS3 by controlling all OSI Layer1 parameters like clock (internal|line) line code used, the way that the link is used (for E1/T1 how the DS0 are used).

The configuration of the controller object generates logical interfaces that are in the case of E1/T1 groups of DS0 timeslots.


In a WAN router you can find network modules that are daughter cards that you can insert into the router. The level of modularity and flexibility is high because this network modules can host submodules like WICs VWICs and son


see


network modules, WAN modules, etherswitch modules under


http://www.cisco.com/web/psa/products/index.html?c=268437717


The term service modules is used instead for multilayer switches modules like CSM, FWSM, NAM..

see

http://www.cisco.com/en/US/products/hw/modules/ps2706/tsd_products_support_series_home.html


Hope to help

Giuseppe


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Giuseppe Larosa Mon, 12/08/2008 - 10:04
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Hello Abhijit,

please provide more details in order to get better help.


What kind of platfom are you referring to?


A multilayer switch like C6500 where service modules are special purpose linecards for example or a wan router ?

What technology are you referring to?

A WAN technology were we deal with T1/E1, DS3 controllers that allow to support for example channelized DS3 ?


This can help narrow the set of possible answers.


Hope to help

Giuseppe


napolean007 Tue, 12/09/2008 - 06:58
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I am referring here regarding a WAN router.

Basically what is the function of a controller..?? & whats the difference between a controller & a service module ?


Correct Answer
Giuseppe Larosa Tue, 12/09/2008 - 14:22
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Hello Abijit,

in a WAN router a controller controls an hardware resource like an E1/T1 or DS3 by controlling all OSI Layer1 parameters like clock (internal|line) line code used, the way that the link is used (for E1/T1 how the DS0 are used).

The configuration of the controller object generates logical interfaces that are in the case of E1/T1 groups of DS0 timeslots.


In a WAN router you can find network modules that are daughter cards that you can insert into the router. The level of modularity and flexibility is high because this network modules can host submodules like WICs VWICs and son


see


network modules, WAN modules, etherswitch modules under


http://www.cisco.com/web/psa/products/index.html?c=268437717


The term service modules is used instead for multilayer switches modules like CSM, FWSM, NAM..

see

http://www.cisco.com/en/US/products/hw/modules/ps2706/tsd_products_support_series_home.html


Hope to help

Giuseppe


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