Showing results for 
Search instead for 
Did you mean: 

Leveraging SBCs to Empower a Changing World of Collaboration - Meet the Authors FAQ


This event had place on Tuesday 16th, February at 9:30am PST


The need for virtual collaboration across individuals, teams, organizations, and industries has been significantly changed with the global challenges presented in 2020. The industry now demands rapid adoption of cloud services and more flexible integrations across disparate services and geographies.

In this session, Cisco Press authors and collaboration experts address how border controllers play a key role in enabling the on-premise to cloud migration and consumption of collaboration technologies. They provide a review of new Cisco Unified Border Element (CUBE) features, and some insight into how Session Border Controllers (SBCs) are enabling cloud integrations and improving collaboration security.

Join the solution experts, who have a combined total of over 70 years of experience designing or supporting complex enterprise collaboration deployments. In addition, the authors will revisit a selection of topics that were covered in the book Understanding Session Border Controllers, and review how the concepts remain important and relevant in a changing world.

Featured Authors
Inamdar.jpgKaustubh Inamdar is a Technical Leader and currently a Manager for Cloud Collaboration Engineering. He is a subject matter expert in the area of real-time communications and has deep knowledge of the associated standards and protocols. He is the co-inventor of eight patents in diverse areas such as collaboration, security, machine learning, and cloud technologies and is also involved in standardization efforts at the IETF. Kaustubh holds a CCIE in Collaboration #4227.
steve-holl.jpgSteve Holl leads the strategy and engineering delivery of teams that support Cisco's cloud-hosted collaboration platforms, as well as teams supporting some of Cisco's largest enterprise collaboration deployments. He previously served as a team lead for voice solutions in Cisco’s Global TAC. He holds a Bachelor of Science degree in applied networking and system administration and a Master of Engineering in engineering management. Steve holds different certifications such as ITIL Expert, PMP, Six Sigma Black Belt, and a CCIE in Collaboration #22739.
carunach.jpgArun Arunachalam is a Cisco Principal Engineer, responsible for resolving complex problems in large-scale collaboration networks and driving solution-level serviceability requirements. He worked closely with engineering teams to implement end-to-end call signaling analysis using SIP Session-ID across Unified Communications and Contact Center products and with industry experts for defining end-to-end SIP message logging capabilities (logme). He is passionate about customer experience and has led innovations such as such as Faster Cisco Support Experience, Virtual Spaces, and TAC Connect Bot. He is a co-inventor of six patents (issued). His areas of interest include ease of doing business, talent development, and innovation. Arun holds a CCIE certification #14809).
kyzer-davis.jpgKyzer Davis is an escalation point for various worldwide cloud and collaboration teams within Cisco Systems. He is the focal point for supporting, troubleshooting, and resolving complex, solution-level problems involving voice, video, cloud, and security portions of the Cisco Unified collaboration product portfolio. Kyzer has authored and presented numerous technical white papers on Cisco collaboration configuration, architecture, protocol design, and security topics; many of which are leveraged by Cisco partners, Cisco exam instructors, and Cisco employees for training and education. He works with Learning@Cisco on strategy and content development for numerous Cisco certifications. Kyzer holds a CCIE certification in Collaboration #54735.
gonzalo.jpgGonzalo Salgueiro is a Distinguished Engineer at Cisco working in the Customer Experience Technology Office. He has spent 24+ years at Cisco, establishing himself as a subject matter expert, an innovator, and an industry thought leader in various technologies, including collaboration, cloud, and IoT. Gonzalo is a regular presenter and distinguished speaker at a variety of technical industry conferences and events around the world. Gonzalo has held various industry leadership roles, including serving as a member of the board of directors of different organizations and industry groups, he is an active contributor to various industry organizations and standardization activities. Gonzalo holds a CCIE certification #4541.
Featured Book
ShowCover.jpgUnderstanding Session Border Controllers is the first comprehensive guide for network professionals and consultants who want to successfully master B2BUA/SBC theory, design, deployment, integration, operation, security, and troubleshooting. Using examples based on CUBE, the authors offer insights that will be valuable to technical professionals using any B2BUA/SBC solution, in any environment.

You can download the slides of the presentation in PDF format here. And the recording of the session here.

Live Questions

Q: The book was released in Dec 2018. With how fast technology is changing. Is this book still very relevant today?

A: [Kyzer] Very much so. The topics selected for the book are ones that will keep the book relevant for a long time. Specifically the Security chapter goes over TLS 1.3 for this very reason which was a draft when the book was being written.

Q: How long did it take to study and complete your CCIE and did you pass first time?

A: [Steve] For me, it was 2 years in my job role to learn the core of the technology and pass the written exam, and then a 6 months pursuit of the lab.
[Kyzer] For me, 4 years of core collaboration job experience. 6 months of study for the written exam and a year or more of study for the lab.

Q: Does Webex calling packages include CUBE licensing, if yes, then after purchasing Webex calling do I only need to pay for the VM?

A: CUBE Trunk licenses (STD or RED) are included in Webex Calling Flex License at 2:1 ratio (users:trunk) for Webex Calling calls only (1 leg to Webex Calling and the other to either the ITSP or CUCM). Note: CSR 1000v licenses are not included in Webex Calling Flex and need to be purchased separately. Take a look at and  (available for partners).

Q: I heard https will replace SIP. Any possibility to have 'https' signaling protocol in CUBE?

A: SIP and HTTP are two very different protocols that serve different purposes. However, HTTP and HTTPS are used with UC API feature set to integrate CUBE with CUCM and 3rd party applications:

Q: Is Media Proxy a separate device? Can it co-exist with CUBE on the same router?

A: CUBE media proxy platforms can be found in this link however it cannot be collocated with a normal CUBE handling SBC features.

Q: When is the media bypass feature expected? Does CUBE support media bypass with Teams integration?

A: Have you tried implementing via this guide? It should be available on IOS-XE 17.3.2 via this guide:

Q: CUCM exist in the cloud? How to check this?

A: Take a look at the resources here:

Q: 8000v is still not mentioned in the datasheet of CUBE 14 why?

A: Capacity testing is still ongoing at the moment.

Q: Like HTTPS, does SIP support End-to-End Security with multiple hops between Source and Destination?

A: SIP doesn't supported e2e encryption. It is on a per hop basis Media, however can be e2e encrypted.

Q: Is the Collaboration Solutions Analyzer for voice trace available now?

A: Yes, please review:

Q: Are there plans to better implement V.150.1 SCIP than only using clearchannel?

A: That is only supported on Digital/Analog Voice Gateways (FXS/FXO/ISDN etc). Otherwise you can do pass through as per this guide: ml/ios/voice/cube_sip/configuration/15-mt/cube-sip-15-mt-book/voi-cube-v150-mer-sdp-passthru.pdf

Q: What developments can you share regards V.150.1 SCIP implementation?

A: Please have a look to  That is the only current implementation in CUBE. I know Sectéra VIPer phones are moving towards a new Soft Modem feature to eliminate the reliance on analog v.150 gateways for pure IP networks.

Q: SBC is virtualized, its software exist?

A: CSR1000v is the current vCUBE virtualized software.

Q: Are there plans to improve debug filtering?

A: There are a number of filter options available for "debug ccsip". If there are specific filters you would like to see, please let us know. 

Q: Is there any minimum IOS version for VoIP trace?

A: Cisco IOS XE Bengaluru 17.4.1a, Cisco IOS XE Amsterdam 17.3.2. See

Q: Could you inform us about the trans coding in this SBC?

A: Cisco CUBE can leverage installed PVDM4 Digital Signal Processors (DSPs) / Packetized and the existing dspfarm configuration set to register a dspfarm to CUBE (associate application cube). This is known as Local Transcoding Interface (LTI based Transcoding) and allows CUBE to perform codec interworking such as g729 on one call-leg and g711ulaw on another along with some raw in-band to OOB DTMF interworking where required. See:

Q: What type of debugs will be captured by VoIP Trace? I would like to know what type of debugs will it capture, will it capture CCAPI in out?

A: It captures VoIP Trace captures SIP messages, SIP errors and debugs related to SIP finite state machine (FSM), events and API calls. And it will not capture CCAPI input but will have similar dial-peer matching information.

Q: Is base64 data in the JWT/passport to carry image data? 

A: [Kyzer]The passport itself is Jason Web Token (JWT) data encoded as base64 for the SIP Identity header. Work into other data types carried in Passport is currently underway via
[Kaustubh]Base64 encoding is used regardless of whether or not a Photo/Logo is part of the PASSporT claim set. The data that can be carried in PASSporT is not restricted to image data. There are a whole host of additional claims that may be embedded within PASSporT. For example, the nickname of the caller, the organizational affiliation of the caller, the title of the caller, among many others. The following IETF draft provides the set of claims that may be used in PASSporT as part of Rich Call Data: ( Once the complete set of claims corresponding to Rich Call Data is added to the PASSporT (this is largely driven by organizational policy or by caller preference), a serialized string containing JSON name-value pairs is constructed, following which the serialized string is BASE64 coded. As a final step a signature is calculated over the BASE64 encoded string to cryptographically assert the set of claims.

Q: I know this session is mainly focused on SBCs, and I see that its now supported on AWS, are there plans for CUCM and other UC apps to be AWS supported?

A: Nothing at the moment. Please take a look at UCM Cloud

Q: How was the author order determined on the book cover?

A: It can be done in different ways, nevertheless, in this book Kaustubh Inamdar was placed on the top since he is the one who started this idea and provided more content for this publication. Another interesting thing to mention, is that Arun Arunachalam requested to place his name at the need of the list since he considered his name to be longer than the other ones. 

Related Information

Recognize Your Peers
Content for Community-Ad