VOX NOVA Fixed Voice OFFICIAL (FVO) & Enterprise Voice (EV)

1. Purpose
The Authority Enterprise OFFICIAL voice system is ageing and requires modernisation. The future end state is a hybrid solution that fuses on-premises calling capability with the flexibility of a cloud-native call management service.
This procurement is for the design, build, migration, and operation of the end state architecture whilst ensuring the users maintain capability throughout the process.
This encompasses design and delivery of a cloud native call management core (Software as a Solution (SaaS) or UK zoned public cloud), migration of existing gateways and SIP native Private Automatic Branch Exchange (PABX), modernisation and Session Initiation Protocol (SIP) enablement or replacement of legacy, non SIP PABX, through life support for legacy PABX estate until migration, resilient public telephony breakout and partner connectivity, local survivability for specific sites, a field engineering competence to ensure compliance with Authority processes and service management.
The existing PABX estate is mostly analogue lines with a small amount of digital and Voice Over Internet Protocol (VoIP) ; it is not envisaged that this will change due to the cost and complexity of replacing the existing cabling.
2. Background
The Ministry of Defence’s (MOD’S) Integrated User Services (IUS) VOX NOVA (VN) Programme is responsible for the delivery of fixed voice telephony at OFFICIAL.
The current FVO service supports Defence outputs, including safety-related and operational use cases. User access is provided through a mixed estate of analogue lines, digital extensions and a smaller number of Voice over IP endpoints, with services terminating on site-based Private Automatic Branch Exchange (PABX) where required.
The existing estate includes a mixture of refreshed IP-native OpenScape PABX, HiPath 3x00 switches and legacy Integrated Services Digital Exchange (iSDX) and Meridian switches. Site-based PABX trunks and Voice Over Internet Protocol (VoIP) handsets...