Lan Expert Voice Networking Solutions

NEC — UNIVERGE Series

IP PBX, UC, Contact Center — on-prem and cloud options

Typical Models	UNIVERGE SV9100, SV9500, SL2100, UNIVERGE BLUE (Cloud UC)
User Capacity	SV9100: up to ~1920 users; SV9500: scalable to tens of thousands with virtualization; SL2100: SMB
Protocols & Signaling	SIP (RFC3261), H.323 (legacy), SIP-T/I gateways, TLS for signaling
Media & Codecs	G.711, G.722 (wideband), G.729, Opus support on cloud clients; SRTP for encrypted media
Connectivity	SIP Trunking, PRI/ISDN gateways (via media gateways), SIP over TCP/UDP, VLAN-aware deployments
HA & Resiliency	Active/standby clustering, geo-redundancy with UNIVERGE BLUE, backup PSTN failover
Management & Provisioning	Web-based admin, bulk provisioning, SNMP, Syslog, REST APIs (cloud)
Security	TLS, SRTP, role-based admin, secure firmware updates, SBC recommended for edge
AI / Cloud Features	UNIVERGE BLUE: speech-to-text, call analytics, basic noise reduction (cloud)

PBXCloud UCContact Center

Avaya — IP Office / Aura / Avaya Cloud

Enterprise & contact center solutions — on-prem, hybrid and cloud

Typical Models	IP Office 500 V2, Avaya Aura Communication Manager, Avaya Cloud Office, Avaya OneCloud CCaaS
User Capacity	IP Office: up to ~3,000 users (with licensing); Aura: carrier-scale (tens to hundreds of thousands across clusters)
Protocols & Signaling	SIP, H.323 (legacy), SCCP support on older endpoints, WebRTC for browser clients
Media & Codecs	G.711, G.722, G.729, Opus (WebRTC), SRTP/TLS support
Contact Center	Avaya Experience Platform: ACD, Workforce Optimization, Recording, Conversational AI, Bot integrations
HA & Resiliency	Active-active clustering, multi-site survivability, cloud failover and SBC fronting
Management & APIs	Centralized admin, Avaya Management Cloud, REST APIs/SDKs for CTI & integrations
Security	SBCs, TLS/SRTP, secure provisioning, role-based access and compliance features
AI / Cloud Features	Avaya Conversational AI, real-time transcription, sentiment analysis, AI routing (Experience Platform)

Contact CenterWebRTCCloud

Cisco — CUCM, Webex Calling & SBCs

Enterprise collaboration, secure edge and cloud calling

Typical Models	CUCM (Unified Communications Manager), Cisco Unity, Webex Calling, Cisco ISR/ASR gateways, Cisco SBC
User Capacity	CUCM clusters support tens of thousands (80k+ users per cluster with appropriate licensing); Webex scales in cloud tenancy
Protocols & Signaling	SIP, SCCP (legacy Cisco phones), WebRTC, TLS/SRTP, SIP over TCP/UDP
Media & Codecs	G.711, G.722, G.729, Opus for Webex/WebRTC, AAC for conferencing; media transcoding via gateways
Edge & Security	SBC for secure border, SRTP/TLS encryption, FIPS-compliant modules for regulated deployments
Advanced Features	Webex AI Assistant (meetings), QoS via Cisco QoS policies, integration with Cisco DNA Center for network insights
Management & Orchestration	Enterprise Manager, Webex Control Hub, Prime Collaboration for device & policy management
AI / Cloud Features	Webex AI: noise removal, transcription, meeting summarization; DNA Center AIOps for predictive network problems

EnterpriseSBCWebex

Siemens / Unify — OpenScape

OpenScape platforms for UC, telephony and contact centers (virtual & cloud-ready)

Typical Models	OpenScape Business X3/X5/X8, OpenScape Voice, OpenScape Contact Center
User Capacity	OpenScape Business: SMB to mid-market (hundreds to low thousands); OpenScape Enterprise: large-scale deployments
Protocols & Signaling	SIP, H.323 (legacy), TDM gateways, WebRTC modules (cloud)
Media & Codecs	G.711, G.722, G.729, Opus (platform dependent); SRTP/TLS support
Contact Center	ACD, Omnichannel routing, CRM integrations, recording & analytics
Management & Virtualization	Centralized provisioning, virtualization support, cloud-managed modules
Security	Encrypted signaling/media, SBC integration, role-based access and hardened appliance options
AI / Cloud Features	OpenScape Cloud adds analytics and voice/sentiment analysis via partner/cloud modules (features vary by offering)

OpenScapeUCVirtualization

Matrix — ETERNITY, PRASAR & Gateways

IP-PBX appliances, media gateways and UC apps — popular in APAC

Typical Models	ETERNITY GENX / NENX series, PRASAR UCS, VoIP Gateways (FXO/FXS/GSM)
User Capacity	Small to large branch models: from tens to a few thousand users depending on model
Protocols & Signaling	SIP, ISDN/PRI (via gateways), TLS/SRTP for secure deployments, WebRTC on UC clients
Media & Codecs	G.711, G.722, G.729, AMR (select models), Opus on modern stacks
Integration	CRM connectors, mobile extension apps, SMS/GSM gateway integrations, API for provisioning
Management	Web GUI, remote provisioning, diagnostics, firmware management
Security	Secure SIP, SRTP, NAT traversal, endpoint authentication; SBC recommended for internet edge
AI / Cloud Features	Selective AI capabilities via cloud analytics: call recording analysis, noise suppression, transcription (depends on deployment)

IP-PBXGatewaysAPAC

Match scale: verify concurrent call capacity, licensing model and clustering limits.
Protocols & interoperability: ensure SIP/codec support for existing trunks & endpoints and SBC compatibility.
Resiliency: evaluate HA, geo-redundancy, SIP trunk survivability and disaster recovery plans.
Cloud vs on-premise: consider latency, compliance, cost of ownership, and feature parity.
AI & analytics: prefer vendors with integrated transcription, noise reduction, and call analytics if required.

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