Edge Architecture

5.7 Network Connectivity Options

5.7.1 Webex Calling Connectivity Architecture

+-----------------------------------------------------------------+
|  CONNECTIVITY OPTIONS - ABHAVTECH                                |
+-----------------------------------------------------------------+
|                                                                 |
|  OPTION 1: INTERNET (Current - All Sites)                      |
|  -----------------------------------------                      |
|  Path: Client -> SD-WAN -> Internet -> Webex Cloud                |
|  Pros: Simple, no additional cost                              |
|  Cons: Best-effort, dependent on ISP                           |
|  Status: SELECTED for Abhavtech                                |
|                                                                 |
|  OPTION 2: WEBEX EDGE CONNECT (Future Consideration)           |
|  -----------------------------------------------                |
|  Path: Client -> SD-WAN -> Equinix Fabric -> Webex Cloud          |
|  Pros: Private connectivity, SLA-backed                        |
|  Cons: Additional cost, Equinix presence required              |
|  Status: Not deployed (evaluate post-migration)                |
|                                                                 |
|  OPTION 3: CLOUD ONRAMP (Cisco SD-WAN Integration)             |
|  -------------------------------------------------              |
|  Path: Client -> SD-WAN -> Cisco Cloud OnRamp -> Webex            |
|  Pros: Integrated with existing SD-WAN                         |
|  Cons: Requires Cisco Cloud OnRamp license                     |
|  Status: Available (ABV-SDWAN-2024 compatible)                 |
|                                                                 |
+-----------------------------------------------------------------+

5.7.2 Bandwidth Requirements

Site	Users	Concurrent Calls	Voice BW	Video BW	Total Required
Mumbai HQ	1,200	120	15 Mbps	60 Mbps	75 Mbps
Chennai	450	45	6 Mbps	22 Mbps	28 Mbps
Bangalore	180	18	2 Mbps	9 Mbps	11 Mbps
Delhi	150	15	2 Mbps	8 Mbps	10 Mbps
Noida	120	12	2 Mbps	6 Mbps	8 Mbps
Pune	100	10	1 Mbps	5 Mbps	6 Mbps
Hyderabad	200	20	3 Mbps	10 Mbps	13 Mbps
London	520	52	7 Mbps	26 Mbps	33 Mbps
Frankfurt	280	28	4 Mbps	14 Mbps	18 Mbps
New Jersey	480	48	6 Mbps	24 Mbps	30 Mbps
Dallas	270	27	3 Mbps	14 Mbps	17 Mbps

Calculation Basis: - 10% concurrent call ratio - Voice: 128 kbps/call - Video: 2 Mbps/call (50% video usage)

5.7.3 Current WAN Capacity (ABV-SDWAN-2024)

Site	Primary Link	Backup Link	Headroom
Mumbai HQ	1 Gbps MPLS	500 Mbps Internet	OK Sufficient
Chennai	500 Mbps MPLS	200 Mbps Internet	OK Sufficient
Bangalore	200 Mbps MPLS	100 Mbps Internet	OK Sufficient
Delhi	200 Mbps MPLS	100 Mbps Internet	OK Sufficient
Noida	100 Mbps MPLS	50 Mbps Internet	OK Sufficient
Pune	100 Mbps MPLS	50 Mbps Internet	OK Sufficient
Hyderabad	200 Mbps MPLS	100 Mbps Internet	OK Sufficient
London	500 Mbps MPLS	200 Mbps Internet	OK Sufficient
Frankfurt	200 Mbps MPLS	100 Mbps Internet	OK Sufficient
New Jersey	500 Mbps MPLS	200 Mbps Internet	OK Sufficient
Dallas	200 Mbps MPLS	100 Mbps Internet	OK Sufficient

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