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Tilda
The internet is gone and the office phones still ring: extensions, transfer, conference, the city line through a local gateway. A Zoom Node in your network takes telephony over until the connection is back.
Zoom Phone lives in the cloud, and an internet outage usually means silence in the handsets. The Phone Local Survivability module, ZPLS, is installed on a Zoom Node in your network and keeps basic telephony running while the cloud is unreachable. Phones and apps on site register with the node and keep working.
What is kept: internal extension dialing, contact search and dialing, hold and resume, DTMF, blind and consult transfer, ad hoc three-party conference, call park. Inbound and outbound calls to the public network are possible too, if the site has a session border controller, an SBC, connected to a local carrier or a local PBX.
If the company has several sites and their nodes share a common network, calls between sites continue during the outage as well. The module takes one of the node's four slots and sits alongside Meetings Hybrid, so one Zoom Node covers both meetings and telephony.
Cloud telephony is convenient right up to the first backbone outage. Survivability gives it back the property of an ordinary phone: it always rings.
Employees dial short numbers, look up colleagues, transfer calls. Nobody notices the cloud is unreachable.
With an SBC and a local carrier, calls in and out continue. Customers get through while the connection is repaired.
Site nodes connected by a common network call each other during the outage too. Branches do not lose each other.
What works in an outage, how it is deployed
Internal extension dialing and contact search on site. The directory is available from the node.
A call is put on hold and resumed. DTMF works for voice menus and codes.
Blind and consult transfer between employees on site.
A call with three participants is assembled on the node without the cloud.
A call is parked and picked up from another handset.
Inbound and outbound PSTN calls with a session border controller and a connection to a local carrier or PBX.
If site nodes share a common network, calls between sites continue during a cloud outage.
Preparation, deploying the module on the node, configuring the account, initialisation, confirming operation, enabling users. Each step is documented by Zoom.
The module is licensed separately, paid. A Zoom Node on site, Zoom Phone licences for users, and for the city line an SBC and a contract with a local carrier are needed.
Wherever a silent phone costs more than a licence
Reception and departments call each other during the outage. The city line through the SBC takes patients' calls.
Dispatch, security and the shop floor on extensions. The internet is being repaired, the plant stays connected.
Stores with nodes on a common network call head office and each other without the cloud.
The city line through a local carrier does not fall with the internet. The customer gets through.
Where there is no backup link, survivability replaces it for telephony.
A scheme of sites and nodes, choosing the SBC and connecting to the carrier, deploying the module, enabling users, drills with the link cut. Then support in Russian.
Communications had to keep working during frequent weather-related internet outages.
We'll give you a remote demo Monday to Friday, 10:00–16:00 Moscow time, answer all your questions and provide trial access so you can explore the system yourself.
Please note: we work with legal entities only.