SIP Peering

SIP Peering or SIP Trunking enables you to statically connect IP-PBX’s with our public sip proxy (

Note: Peering differs from Registration which relies on an authenticated UserName, Password to connect to our voice proxy.

Once you have enabled SIP Peering we whitelist your WAN IP blocking any other IP from communicating with our Voice service but an additional security measure from your side we advise setting a firewall rule restricting access to your SIP port to our public IP * See also Ports and IPs.

We support three modes of Peering:

  1. SIP Peering Global
  2. SIP Peering Standalone
  3. Trunking

SIP Peer Global

Routes all Inbound and Outbound traffic on an account to a single nominated WAN IP linked to one phone number. With the exception of Call Forwarding for emergency failover global Peering disables all functionality other CloudPBX functionality.

  1. Log into your account.
  2. Select Switchboard.
  3. Select the phone number to set SIP Peering against.
  4. Select Preferences.
  5. Select SIP Peering Global.
  6. Add Primary Trunk Host IP Address, and failover Trunk IP Address (optional)
  7. Select SAVE

Standalone Peer

A Standalone peer is where the network admin connects a IP-PBX to a single number. Standalone peering is convenient mechanism enabling administrators to connect multiple offices each with their own WAN IP.

  1. Log into your account.
  2. Select Switchboard
  3. Select Preferences
  4. Select Line SIP Peering Standalone >> Enable
  5. Add IP Address.
  6. Select SAVE

Once Standalone is enabled SIP Peering Global will be disabled.


Trunking is a Registration feature that allows you to present the CLI of another number on your account, using a trunking number removing the onerous task of individually registering large blocks of numbers to preserve CLI.

The Outbound trunking example below will present 61289707502 as the outbound CLI while using 61289707500 as the registered trunk number:

From: "61289707502" <sip:61289707500@>;tag=1c1952424
To: <sip:0450301522@>
  1. Log into your account.
  2. Select Switchboard.
  3. Select your number.
  4. Select Preferences | Trunking.
  5. Set Inbound trunking number
  6. Select Outbound Trunking
  7. Select Save.
Updated on 19 October 2021

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