Sample VOIP Design Solution 1

Objective: – To setup a Voice Network Design for a new office.

Description: – An office for company “XYZ” is coming up in a new location. The company wants an end to end VOIP Design (IP Telephony) to meet its business and IT requirements.

Requirement Baselines:-

Note: – Pl fill the below questionnaire to the best of your understanding.

1. How Many users will be using the Voice Setup in the new Office?
   • ANS – 10

1. Will the voice PBX be installed in the Local Office or IP phones register to Head Office or Data Center PBX?
   • PBX will be in  (a)Local office or (b)Head Office or Data Center
   • ANS – (a) Local Office
   • If above answer is “Local Office” then will the local PBX require dialing over WAN towards head Office or remote office calling?
   • ANS – Yes, for reaching the Head Office/Remote phones over WAN or MPLS links  
   • If above answer is “Head Office or Data Center” then does the local office site require voice availability in case central PBX is down or not reachable?
   • ANS – Yes
2. How many WAN and PSTN links will be required for Voice setup?
   • WAN Links (MPLS or PTP)
   • ANS – 1 WAN Link (5 Mbps) with connectivity to head Office for Voice and Data
   • PSTN Links –
   • ANS – 4 Analog PSTN (DS0) lines for incoming and outgoing calls to head office and other location during event of WAN link failure. (Hint – Generally for every 10 users inside office, we can take 2 to 4 PTSN voice channels. One voice channel may be understood as one voice call.)
3. Pl segregate the voice phones in terms of
   • Analog Phones
   • ANS – 2
   • IP Phones (Black and White)
   • ANS – 6
   • IP Phones (Colored Display)
   • ANS – 1 for Dept. Head
   • Receptionist phone (for attending and diverting the calls to respective phone/user)
   • ANS – 1 for accepting the hotline number.
4. Will the voice and Data connectivity provided on same ports? If yes, then what will be the Data and VoIP connectivity speed?
   • VOIP Phones
   • ANS – 100 Mbps
   • Data Ports
   • ANS – 100 Mbps
5. What additional features/functionalities do voice users require? Pl describe against each requirement?
   • Voice Mail?

1. • Yes

1. • Voice mail delivery on email?

1. • No 

1. • Conferencing (3 Party or more)?

1. • Yes, 3 parties should be good

1. IS Jabber for Windows Integration required for voice calling via local PBX? If yes, what is the number of “jabber for windows” software?

1. • ANS – No

1. Is there plan any to expand the new Office users/IT setup ?
   • ANS – No
2. It is assumed that a single Server/Hub Room will provide connectivity to all the endpoints (nodes).All the nodes will be within distance limit of 90 Meters of LAN Cable (Server room to end points).If more than 2 hub rooms or distance of endpoint to Hub room more than 100 Meters, pl provide detailed connectivity requirement.

ANS – Single Hub Room with distance of endpoints with 90Meter from Hub Room.

1. 1. Is redundancy required at (a) WAN/Internet Link (b) WAN Router/Firewall (c) LAN Switch etc.
   • ANS – 1 WAN Link only
     
   • ANS – No WAN Router redundancy
   • ANS – No LAN Switch redundancy

Proposed Solution:-

The Internet Router/IP PBX will provide the following functionality

1. Will be local PBX and all the IP/analog phones will register to it. (Call Manager Express)
2. Will route voice to head office over WAN link and over backup PSTN in case of WAN link failure.
3. Provide voice mail functionality when calls to phones go unanswered.
4. Perform BGP/IGP routing with WAN provider links (Data Links only)
5. Perform H323 signaling with PSTN provider links
6. Will act as DHCP server for all Vlans in New Office.

1. Vlan Segregation:-

The Router will act as layer 3 gateway (192.168.XX.1/24) for all the Vlans

Total 4 Vlans will be carved out (Voice, Data, Server and Services Vlan).

Note: – for reference, we take 192.168.0.0 private address range inside the New Office network.

Key considerations:-

1. The WAN provider needs to provide Ethernet drop (10/100/1000 Mbps) at the new Site. The provider Ethernet cable will directly terminate in Internet Router/Firewall.
2. Solution sized for 
   1. Maximum concurrency of VOIP calls over WAN = 4.

AND

1. 1. Maximum 4 Analog PSTN calls (DS0 i.e. 4 voice channels).Note – PSTN links will be backup in case of WAN link failure.

Indicative Bill of Quantity:-

Internet Router cum IP PBX (Cisco)

IP Phones

Note: – 2 Analog Phones also need to be procured.