Network Setup Recommendations
  • 12 Oct 2023
  • 3 Minutes to read
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Network Setup Recommendations

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Article Summary

Dialpad is a cloud-based business phone system that allows you to make and receive calls from anywhere in the world, as well as manage contacts, get call logs and voicemails, transfer calls, and more. 

We know you are on the move, and we're pleased to confirm that Dialpad is operable on any device with a reliable internet connection!

Let's dive into the details of network settings.

Bandwidth calculations

To ensure the best possible voice quality, we recommend using a high-speed DSL, Broadband, or Fiber-optic connection for all services. This applies to desk phones, Dialpad Desktop software, Dialpad Web App, and any CTI/mini dialer (ie: Salesforce CTI, Chrome CTI Extension, etc)

Calculate for each concurrent instance you plan to run:

  • Voice: minimum 100kb/sec up/down
    • Mobile Voice: minimum 4G (or equivalent wifi access)
  • Video 1:1 Calls: minimum of 1.2-1.5Mbps up/down
  • Video Meetings: minimum 1.2-1.5Mbps up and 3Mbps down
    • Mobile Video (any): 4G+ (or equivalent wifi access)

Routers, switches, and firewalls

Dialpad does not require a specific brand or mode router, switch or firewall — however, to achieve the best possible quality of service, the Network hardware should have the following capabilities:

  • QoS
  • Bandwidth Limiting
  • SNMP

We also require that the following features to be turned off for Dialpad traffic (as they can interfere with the service). Please contact our Support Team if you are unable to turn off these features:

  • SIP-ALG
  • Deep Packet Inspection (DPI)
  • Stateful Packet Inspection (SPI)
Aren't Stateful Firewalls the same as a Stateful Packet Inspection?

No. A stateful firewall is a type, while a stateful packet inspection is a firewall and/or router setting (which, we recommend disabling).

VPN

Dialpad is not designed to function over a VPN. If your company uses a VPN, please utilize a split tunnel and direct Dialpad traffic outside of the VPN. 

VLAN

A virtual LAN (VLAN) can be used to put your hard-wired phone devices into separate networks, and to manage security and routing policies separately. If you plan to deploy IP phones, they can be placed in a "voice VLAN".

A voice VLAN is not a network requirement for Dialpad service but best practices for setting security, DHCP, routing, QoS/CoS a voice VLAN may be used.

Note: 

Setting a voice VLAN is required when Workstations are daisy-chained through IP Phones.

DHCP option 66

For each Voice VLAN there are phones configured on, you'll need to set up the DHCP server with the following URL: https://prov10.dialpad.com

Once the URL has been configured, the phones will need to be attached to the correct Voice VLAN and support:

  • CDP
  • LLDP
  • Auto VLAN Discover
  • Static Assignment

Multiple Internet Circuits 

If you are utilizing multiple internet circuits, best practice is to set them up as Primary/Failover. 

Please contact our Support Team for any questions. 

FQDNs

Routing to a Fully Qualified Domain Name (FQDN), allows modern cloud networks flexibility for routing, security, system maintenance and remote device management.

Dialpad uses FQDNs for managing:

  • Registrations
  • SIP requests to set up a call
  • Device Firmware
  • Device Configurations
  • Remote Devices

Dialpad recommends allowing traffic to and from each of the following FQDNs:

  • dialpad.com
  • www.obitalk.com
  • www1.obitalk.com
  • prov.obitalk.com
  • devpfs.obitalk.com
  • storage.googleapis.com
  • ubervoice.ubervoip.net
  • turn.ubervoip.net
  • stun.l.google.com
  • uvwss.ubervoip.net
  • legacy.dialpad.com
  • dialpadcdn.com
  • static.dialpadcdn.com
  • prov*.dialpad.com
  • google-public-dns-a.google.com
  • google-public-dns-b.google.com
  • *pusher.com
  • *googleusercontent.com

Ports & protocols

Port and protocols used by Dialpad phones and applications residing in a private network are listed below. Outbound port configurations are needed on the firewall to allow traffic to the destination ports listed in the right-hand side column of the tables. Stateful firewalls (not to be confused with stateful packet inspection!) are recommended for Dialpad deployments. For a stateful firewall, inbound port configurations are not needed as they are automatically opened as a reply to the outbound traffic.

Desktop Native, Mobile, & Browser Applications

Traffic Type
Protocol
Domain
Port 
Product features (images, social profiles etc) HTTPS (TCP)

*.dialpad.com

*.dialpadcdn.com

443
MessagingHTTPS (TCP)
WSS (TCP)
*.dialpad.com
*.ubervoip.net
*.pusher.com
443
Transport UDP and TCP 

*.dialpad.com

*.ubervoip.net

5060, 7060
Call SignalingWSS (TCP)
SIP/TLS (TCP)
*.dialpad.com
*.ubervoip.net
443, 5061
Call MediaSRTP (UDP)No specific domain or IP16384 to 32768
Customer Media (contact, avatar, MMS images)HTTP (TCP)No specific domain or IP443
STUNUDPstun.l.google.com19301 to 19302
TURNUDP and TCPturn.ubervoip.net 443
Server DiscoveryDNS (SRV records)

google-public-dns-a.google.com

google-public-dns-b.google.com

53


Desk Phones - Poly, Obi-Edition & UCS and Yealink 

Traffic Type 
Protocol
Domain
Port 
Provisioning HTTPS (TCP)

*.dialpad.com

443
Transport UDP and TCP 

*.dialpad.com

*.ubervoip.net

5060, 7060
Call SignalingSIP/TLS (TCP)*.dialpad.com
*.ubervoip.net
5061
Call MediaSTRP (UDP)No specific domain or IP16384 to 32768
Poly Device Management System (PDMS)TCP/UDP *.obihai.com
*.obitalk.com
*.polycom.com 
443, 10000 to 20000
Firmware Downloads TCP*.dialpad.com
downloads.polycom.com
storage.googleapis.com 
80, 443
Network Time Service NTP (UDP)pool.ntp.org123

Directory Services (LDAP)

TCP

*.dialpad.com

389

Yealink Remote Provisioning Services (RPS)TCP/UDP*.yealink.com443

Unsupported Configurations

Dialpad does not support using our services through the following tools:

  • Virtual Machines (VMs)
  • Virtual Desktop Interfaces (VDIs)
  • Remote Desktop Clients (RDPs)

For running the network tests, please follow the instructions noted in this Help Center article.


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