In a modern enterprise, telephone communication is an integral part of technological processes. Separate divisions and remote offices of enterprises also need telephony. To ensure a unified numbering plan, a unified set of services, centralized accounting, and call recording, it is necessary to have a unified telephone network in the head office and divisions. It is also desirable to maintain the operability of telephony services in the event of a communication failure between the head office and a branch. To solve such problems, we suggest installing IP PBXs in remote departments in survival mode with transit registration of subscribers on the IP PBX of the head office.
This document will focus on the central ECSS-10 Softswitch PBX and the SMG series branch PBX. Depending on the number of subscribers and the type of external connections, any of the following IP PBXs can be used in the branch:
Fundamentally, the configuration of this PBXs as a survival node does not differ, and the document will provide the configuration for SMG-3016.
Analog telephone sets can be connected via TAU series subscriber gateways.
Figure 1. Proposed solution diagram
This document discusses typical solutions for ensuring the fault tolerance (“survivability”) of a telephony system using hardware and software Eltex products. IP PBXs, SMG series trunk gateways, and TAU series subscriber gateways are devices that meet modern requirements for building telephone networks.
Possible typical solutions
This document will be useful for engineers who are working on setting up telephony systems in bank branches, company offices, and manufacturing facilities. The scalability and extensive list of supported protocols allow the proposed schemes to be used for a wider range of tasks.
Tips provide additional information on device operation and setup. |
Notes contain important information, tips or recommendations on device operation and setup. |
Warnings inform users about hazardous conditions, which may cause injuries or device damage and may lead to the device malfunctioning or data loss. |
ECSS-10 — see Softswitch.
FXO — Foreign eXchange Office — analog interface for connecting to higher-level equipment to the FXS port.
FXS — Foreign Exchange Station or Subscriber — analog interface for connecting subscriber devices (telephones and fax machines, lower-level automatic telephone exchanges) via a copper line.
FQDN — Fully Qualified Domain Name — full domain name.
PoE — Power over Ethernet — technology for delivering power to end devices via twisted pair cables.
Softswitch — software package that provides core telephony functions for departmental, corporate, and operator networks manufactured by Eltex.
SSW — see Softswitch.
AWS — automated workstation.
Domain — Virtual PBX within a Cluster. There can be multiple domains in a single Cluster.
Cluster — collection of computing nodes of the same type that perform a single function from the system's point of view. Used to describe the computing topology of the system.
PSTN — Public Switched Telephone Network.