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ASK THE EXPERTS : Cisco Unified SIP Proxy (CUSP)

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Jul 1st, 2011


Read the biowith Raees Shaikh


Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn tips on Installation, Upgrade, Configuration & Troubleshooting Cisco Unified SIP Proxy (CUSP) with Cisco Expert Raees Shaikh. Raees has worked in the Cisco Technical Assistance Center for over two years. He focuses on Cisco Unified Communications Manager, Cisco Unified Border Element, Gateways, Cisco Unified SIP Proxy, and other VoIP-related devices. Prior to joining Cisco he was a network engineer with Microland Ltd. He holds a bachelor of engineering degree in electronics and telecommunication from Goa University and holds CCVP,  and CCNP  certifications. He is currently working towards his CCIE Certification.

                                   cusp-1.bmp

Remember to use the rating system to let Raees know if you have received an adequate response.

Raees might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation on the shortly after the event. This event lasts through July 15, 2011. Visit this community often to view responses to your questions and the questions of other community members.

Message was edited by: Muthurani Lavanya Paneerselvam

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tenaro.gusatu.novici Mon, 07/04/2011 - 12:22

Hi,

could you please explain what is the benefit of having CSPS in the network? I'm trying to figure out what is unique feature that CSPS can offer and CUCM can't, especially if we throw some CUBEs too? I'm intentionally using name CSPS to show you I'm not familiar with recent changes but I'm guessing USP is CSPS's successor. Also, some Cisco sales representatives were mentioning that this product will be EoS soon and I will appreciate if you have info about that one too.

Regards,

Tenaro

rashaikh Tue, 07/05/2011 - 21:05

Hi Tenaro,

Please find the answers inline to your questions:

1. Could you please explain what is the benefit of having CSPS in the network?

[Answer] The CSPS was designed to cater the need of pure SIP networks ex. SIP service providers, which needs SIP Registrar & Proxy server for call routing using SIP standard only.

The Cisco SIP Proxy Server is part of the Cisco Voice Infrastructure and Applications (VIA) solution for service providers. Service providers can use the Cisco SIP Proxy Server to offer voice services between SIP-based application service providers (ASPs) and the public switched telephone network (PSTN). The Cisco SIP Proxy Server also provides residential voice services over broadband access as part of the Cisco Broadband Local Integrated Services Solution (BLISS). Enterprises can use the Cisco SIP Proxy Server for internal IP telephony transit among enterprise voice gateways and SIP-capable IP PBXs, as well as interconnection with the PSTN.

Please refer the below URL for more information

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/vcallcon/ps2157/product_data_sheet0900aecd800f3968.html

2. I'm trying to figure out what is unique feature that CSPS can offer and CUCM can't, especially if we throw some CUBEs too?

[Answer] When it comes to SIP registration & proxy service, both CSPS & CUCM provide almost the same functionality. However, the CUCM is more rich in features as compared to CSPS & can be used to accompalish lot more tasks other then SIP Registrar & Proxy service. Ex. Extension Mobility. However, this comes with added costs. Therefore as described in the above answer, CSPS is mainly ment for pure SIP networks like the SIP service providers whereas the CUCM is designed to accomplish the Enterprise needs.

Please check the below URL for more information

http://www.cisco.com/en/US/docs/voice_ip_comm/sip/proxies/2.1/administration/guide/1over.html

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_0_2/ccmfeat/fsgd-802-cm.html

3. I'm intentionally using name CSPS to show you I'm not familiar with recent changes but I'm guessing USP is CSPS's successor.

[Answer] CUSP is a different product than the CSPS & is designed for totally different purpose. CUSP is only a SIP Proxy server and does not offer registrar service. However, CUSP has its own benifits & some of them are listed below

§ Simplifies management of large SIP networks – no need for full mesh network configuration

§ Dial plan provisioning, DNS, TLS

§ SIP trunk aggregation (CUCM, CUCME, SP trunks)

§ Flexible routing and normalization policies

§ Load balancing between SIP elements, such as CUBE’s, CME’s

§ High availability

§ Integrated solution in ISR

§Single box

§Eliminates need for separate stand-alone proxy server

§Simplifies management

CUSP 8.5.1 onwards, we can have both CUSP & CUBE or CUSP & CME on the same ISR router, thereby avoiding the need for a seperate CUSP server or router to run the module.

I am also uploading a Video on CUSP Concepts shortly that will discuss this in more detail.

4. Also, some Cisco sales representatives were mentioning that this product will be EoS soon and I will appreciate if you have info about that one too.

The CSPS has already reached the EoL

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/vcallcon/ps2157/prod_end-of-life_notice0900aecd8057f1a6.html

In regards to CUSP, the latest release CUSP 8.5.2 has been released on "Release Date: 22/APR/2011" & the End of Life announcement is not yet out, as we are still working to add more functionalities keeping in mind the need & demand for this device.

http://www.cisco.com/cisco/software/release.html?mdfid=282506798&flowid=5348&softwareid=282707924&release=8.5.2&relind=AVAILABLE&rellifecycle=GD&reltype=latest

I hope I was able to answer all your questions. If you have any doubts or need any further clarification, please feel free to reach out to me, I will be glad to assist.

Regards,

Raees Shaikh

PS:Rate the posts if they are helpful.

tenaro.gusatu.novici Sun, 07/10/2011 - 10:47

Thanks for the great answer!

I would like to rate the post but I don't see any stars. I even tried logging from other devices but result was same. Sorry for that.

Best regards,

Tenaro

P.S. Did you already post that video?

rashaikh Mon, 07/11/2011 - 00:58

Hi Tenaro,

Thanks for your response. I am glad to know my response was helpful in answering your queries.

Please check the video on Intoduction to CUSP below

https://supportforums.cisco.com/videos/2389

Thanks & Regards,

Raees Shaikh

P.S. : You should be able to rate the response after login into CSC webpage. If you are still unable to rate, please let me know & I will look into it further.

bsethu Wed, 07/13/2011 - 04:47

Hi,

could you please explain about ATA187 device and configuration command in SRST mode?

I ma new to this forum.please help me on this..

Regards,

S.Balamurugan

rashaikh Wed, 07/13/2011 - 23:02

Hi Balamurugan,

This Ask the Expert forum is based on Cisco Unified SIP Proxy (CUSP) related topics. Regarding ATA187, kindly post your question on the below CSC Discussion Forum & someone should be able to guide you

https://supportforums.cisco.com/community/netpro/collaboration-voice-video/ip-telephony?view=discussions

Nevertheless, the documents in the below location should be able to help you in regards to ATA187

http://www.cisco.com/en/US/partner/products/hw/gatecont/ps514/tsd_products_support_configure.html

Thanks & Regards,

Raees Shaikh

Haitham Hadad Sun, 07/10/2011 - 14:45

Hi Raees,

very good info on this product

so it is best fit on only sip phones network with basic features [as calls only]

so we don't need to have cisco phones and could have only third party sip phones to lower the cost for the customer ?

or there will be also Cisco sip phones with limited features with lower prices so the customer could compare a cisco sip voip network to the other voip solutions ?

thanks for your valuable info

rashaikh Mon, 07/11/2011 - 01:02

Hi Hytham,

The CUSP can only work as a Proxy server. Inorder to register SIP Phones, you need a registrar service, which is not possible with CUSP. However, the CUCM can act as a Proxy & Registrar server for phone registeration including 3rd party SIP Phones.

The Cisco Unified SIP Proxy is designed to accomplish different goals & requirement in the SIP network. Below Video should be able to give you more information

https://supportforums.cisco.com/thread/2092107

If you need more information, please feel free to reach out to me.

Thanks & Regards,

Raees Shaikh

PS:Rate the posts if they are helpful.

sandipsr71 Tue, 07/12/2011 - 03:54

HI,

I am a computer student with 4 years of ecperience in networking. I ahve also completed A+&N+, I am thinking of going for CCIE R&S course and exam, are there any specific education requirements to go for it?. Like we have to complete the CCNA then CCNP later on CCIE?. I have good knowledge of networking so could you suggest to go for CCIE?

I am totaly confused for this, please help me out.

Your suggestion would be too worthy for me.

Thankyou.

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