Zoom Phone Local
Survivability (ZPLS)
Enables branch-level resiliency
for large-scale organizations

Zoom Phone Local Survivability (ZPLS) enables branch-level resiliency for large-scale organizations likeretailers, schools, and universities that require ongoing and reliable connectivity.
ZPLS enables Zoom Phone applications and Zoom-certified devices to register to the corresponding ZPLS
module when cloud connectivity is down, as well as between other ZPLS-enabled sites, to keep the corephone functionality active. Once cloud connectivity has been restored, the devices re-register to the Zoomservers automatically.

When activated, ZPLS supports internal extension dialing, inbound and outbound PSTN calls (which requires
local PSTN connectivity), E911 support for calls to Emergency Services, Hold/Resume Call, Call Park and ad
hoc third-party conference calling. It also supports the searching of contacts and dialing numbers froma device’s call history.

AudioCodes ZPLS appliance
The AudioCodes appliance for ZPLS includes a server running the ZPLS application and SBC and/or gateway for
PSTN breakout, making the deployment and operation of ZPLS simple and hassle-free while creating a resilient
Zoom Phone environment.
This innovative appliance accommodates a small-scale server or Zoom Node that is connected directly to theZoom Cloud during normal operations and works on a standalone basis when communication to the cloud is lost,
thus allowing phone clients and devices to register to the corresponding ZPLS module when cloud connectivity
is down.
Zoom Node provides a secure framework to locally host ZPLS and similar workloads and is managed andcontrolled from the Zoom Cloud, so the ZPLS software (and other workloads) can auto-update from the cloudand easily return to a backup mode when connectivity is restored. This ensures that local survivability for Zoom
Phone users is achieved in a simple and seamless way.
Having both ZPLS and the SBC running in one box leaves less room for configuration errors and also means that
there is less equipment to look after.

ZPLS

enablesbranch-level

resilience

and

basic

phone

functionality if cloud connectivity is lost. AudioCodes' appliancefor ZPLS includes a server running ZPLS and SBC for PSTN breakout.
1Zoom Phone Local Survivability (ZPLS) - Enables branch-level resiliency for large-scale organizations

Core service continuity functionality
Single appliance hosting Zoom Phone Local
Survivability (ZPLS) on an AudioCodes SBC

Simple and hassle-free deployment

Maintain inbound and outbound PSTN calls(requires local PSTN connectivity)

Quick and automatic failover process

Maintain seamless communication between
ZPLS-enabled sites

Supports key Zoom calling features during failure

Interoperability Topology
The interoperability between AudioCodes SBC and Zoom Phone Local Survivability with the Generic SIP Trunkand Zoom Phone system is done using the following topology setup: Enterprise deployed with Zoom PhoneLocal Survivability Node and the administrator's management station, located on the LAN Enterprise deployedwith the Zoom Phone system located on the WAN for enhanced communication within the Enterprise Enterprise
wishes to offer its employees enterprise-voice capabilities and to connect the Enterprise to the PSTN network
using AudioCodes’s SIP Trunking service AudioCodes SBC is implemented to interconnect between the Zoom
Phone Local Survivability Node, SIP Trunk and the Zoom Phone system • Session: Real-time voice session usingthe IP-based Session Initiation Protocol (SIP). • Border: IP-to-IP network border. The Zoom Phone Local Survivability
Node is located in the Enterprise LAN. The AudioCodes’s SIP Trunk and the Zoom Phone system are located in thepublic network. The figure below illustrates this interoperability topology:

Layout of an interoperability Test Environment
Enterprise NetworkDMZManagement
Station (OAMP)LAN

FirewallInternet
SIP Trunk

ZPLS
Zoom User

2Zoom Client

ITSP

PSTN

Zoom Phone Local Survivability (ZPLS) - Enables branch-level resiliency for large-scale organizations

M800C-2ET4O-ZPLSMediant 800C with 2 E1/T1 and 4 FXO interfaces for Zoom
Phone Local Survivability (up to 2,000 registrations)

M800C-4ET-ZPLS

Mediant 800C with 4 E1/T1 interfaces for Zoom Phone Local
Survivability (up to 5,000 registrations)

Includes Mediant 800C chassis with 2 E1/T1 and4 FXO interfaces and 4 GE ports.

Includes Mediant 800C chassis with 4 E1/T1
interfaces and 4 GE ports.

Zoom Phone Local Survivability application is
pre-installed on 8-cores OSN (with 16 GB RAM,256 GB SSD).

Zoom Phone Local Survivability application is
pre-installed on 16-cores OSN (with 16 GB RAM,
256 GB SSD).

Provided with VMware vSphere Essentials
license, and a recovery dongle.

Provided with VMware vSphere Essentials
license, and a recovery dongle.

Supports dual AC/DC power supplies (optional
AC/DC power adapter can be orderedseparately).

Supports dual AC/DC power supplies (optional
AC/DC power adapter can be orderedseparately).

SBC sessions should be purchased separately

Arrives with 0 SBC sessions.

The AudioCodes ZPLS appliance, as well as AudioCodes SBCs, can be managed via the AudioCodes One VoiceOperations Center (OVOC). This makes it easy for busy IT professionals to oversee a large network containing
ZPLS appliances, SBCs and other devices, from any location.

1 Hayarden Street, Airport City, Lod, 7019900, Israel
Tel: +972-3-976-4000
80 Kingsbridge Rd - Piscataway, NJ 08854
Tel: +1-732-469-0880
www.audiocodes.com

3©2023 AudioCodes Ltd. All rights reserved. AudioCodes, AC, HD VoIP, HD VoIPSounds Better, IPmedia, Mediant, MediaPack, What’s Inside Matters, OSN,SmartTAP, User Management Pack, VMAS, VoIPerfect, VoIPerfectHD, Your
Gateway To VoIP, 3GX, VocaNom and AudioCodes One Voice are trademarks
or registered trademarks of AudioCodes Limited. All other products ortrademarks are property of their respective owners. Product specifications aresubject to change without notice.
02/23 V.1

Zoom Phone Local Survivability (ZPLS) - Enables branch-level resiliency for large-scale organizations