# Hosted PBX Network Requirements

The following document outlines the requirements of the Hosted PBX platform.

It is highly recommended that your network environment meets or exceeds the below requirements in all areas listed.

Unexpected issues may arise if your network environment is not compatible with the below requirements.

# Customer Environment Requirements

Customer Environment Requirements Description
IP Routing and hardware

 Connection to an NBN 25M speed tier or better (Ethernet or Fibre highly recommended) Internet connection.

Available bandwidth of 100 Kbps per concurrent call (both download and upload).

A Netcomm NL1901ACV or Netcomm NF18ACV or better for 4 or fewer concurrent users.

Business/Enterprise class gateway/firewall (example: Cisco 800 or greater/Cisco Meraki/Cyberoam/etc) or better for 5 or more concurrent users.

SIP ALG protocol must be disabled.

QoS enabled to provide high priority to Hosted PBX traffic to/from the Hosted PBX server ranges on the following IP subnets:,,, (any packet inspection should also be disabled)

Full IP connectivity
to the Hosted PBX registration servers on the following ranges – /24,, (any packet inspection should also be disabled).

Full IP connectivity to the Hosted PBX provisioning servers on the following range – /24 (any packet inspection should also be disabled).

Full IP connectivity to the PBX Softphone registration servers on the following range - /24 (any packet inspection should also be disabled).

A static public IP address that has been added to the Firewall Rules management section in the PBX portal. This is the public IP address used by the Hosted PBX phones.

LAN Environment

Cabling (Category 5e cable or better between compatible PoE network switch and handset).

Connectivity to a switch (with uplink for Internet access) via a RJ-45 port using
Category 5e or better cabling.

Power over Ethernet (PoE) allowing for a draw of 2.4 – 10.5 W per phone OR; individual power pack and general power outlet (GPO) per phone.

DHCP server with available IP addresses in a subnet with Internet connectivity.

DHCP Server providing option 66 and option 160 if auto-provisioning is to be used.

A single VLAN for both data and phones OR; a voice VLAN and data VLAN both with Internet connectivity.

IP connectivity between PC’s and phones.

LAN switches that are able to cope with a high count of Packets Per Second (50 to 100 packets per call per user).

# Firewall Rules

The following firewall configurations are required for Hosted PBX phones to successfully register to the Hosted PBX registration servers and successfully receive/initiate inbound and outbound calls:

Firewall Ports Network Protocol Application Protocol Description
5060 UDP & TCP SIP UAS Used for SIP signalling (Standard SIP Port, for default Internal Profile)
16384 - 32768 UDP RTP / RTCP multimedia streaming Used for audio/video data in SIP and other protocols.

# Auto Provisioning

Phones on the Hosted PBX platform can be enabled for auto-provisioning.

The following DHCP options will be required for auto-provisioning to work correctly:

DHCP Option Value Support Phones
66 ps.mycloudpbx.com.au Cisco, Linksys & Yealink


ps.mycloudpbx.com.au Polycom

Additionally, for the phones to successfully download their configuration files, it is required that the following protocols be enabled for inbound and outbound communication:

Protocol Support Phones
TFTP Cisco, Linksys & Yealink


Cisco, Linksys & Yealink



Last Updated:: 2/26/2021, 3:32:10 PM