• Feature rich with over 750 call processing and telephony features
• Highly scalable with support for up to 22,500 IP users off of one Call Server, multiple Call Servers networked together can support unlimited scalability
• World class reliability and redundancy mechanisms - survivability options include Campus and Geographic redundancy to support network failover
• Comprehensive security mechanisms ensure signaling, media and IP security with support for sRTP, IPsec, SIP TLS and AES-128 encryption
• Broad portfolio of Media Gateways support a wide range of client types with flexible scalability options and support for a complete range of analog and digital trunk interfaces
• Extensive desktop portfolio includes; Wireless, Soft-phones, IP, Digital and Analog set support, to meet diverse end-user requirements
• Over 750 features, including: Ad-Hoc conferencing, Scheduled Conferencing, Attendant Recall, Automatic Busy Redial, Call Duration Display Timer, Call Forward (9 types), Call Join, Call Park, Call Transfer, Call Waiting, Calling Line Identification, Calling Party Name Display, Charge Account Codes, Controlled Class of Service, DID Route Control, Flash, Hold, Hunting (6 types), Internal Forward, Malicious Call Trace, Override Position Busy, Remote Message Waiting, Ring Again and many more
• Transparent feature interworking across an IP WAN among Communication Server 1000, Meridian 1 and Business Communications Manager systems
• Telephony integration with desktop application providers such as Microsoft and IBM

• Resiliency mechanisms ensure your network stays up and operational to ensure you stay focused on the business at hand
• Security mechanisms ensure your network traffic, data and users are protected - so you can worry about growing your business
• Open architecture enables integration with 3rd party clients and applications to deliver solutions that meet your objectives
• Simple, scalable architecture enables you to deploy one solution today and evolve it as your needs dictate
• Empower your mobilized workforce with the same capabilities and tools available to the desktop
• Distributed services across a common communication network improves efficiency
• Extensive desktop capabilities, including IP, digital and analog phone support leverages support of existing infrastructure
• Integration with world-class telephony and multimedia applications from Nortel and 3rd parties provides your workforce with the tools to excel
• Architecture and philosophy that ensures investment protection
• An evolution path from TDM to IP - at your own pace!
• Communication Server 1000 is an integral part of Nortel's Unified Communications (UC) Vision and will evolve with you as your needs change
• Integration with Microsoft and IBM UC solutions extends telephony capabilities to the desktop for enhanced productivity

Communication Server 1000E Call Server Capacity: 22,500 IP endpoints

Operating System: VXWorks and Linux

• IP:IP Virtual Trunks using IP Peer Networking over H.323 or SIP
• Digital: DTI, ISDN-PRI, ISDN-BRI
• Analog: Loop and Ground Start CO, FX, WATS, two or four wire E&M, four wire DX, DID, TIE, RAN Paging

Telephone Compatibility:

• IP Phone 1100 Series, IP Phone 2000 Series
• IP Audio Conference Phone 2033
• IP Softphone 2050 (Windows) and Mobile Voice Client 2050 (Pocket PC)
  Wireless LAN Handset 2200 Series, Wireless LAN Handset Series 6100
• IP Phone/Client Accessories: Expansion Module for IP Phone 1100 Series (18-button); Expansion Module for IP Phone 2000 Series (24-button); Enhanced USB Headset Adapter (desktop) and Mobile USB Headset Adapter for IP Softphone 2050
• Digital Telephones: M3900 Series
• Analog telephones

IP Phone Powering Options: 802.3af Power over Ethernet, Power over LAN Hub and local AC adapter

Application Support:

• Integrated Telephony Applications: Conference Bridge, Personal Call Director, Recorded Announcement
• Branch Office/Teleworking/Mobility: Remote Office 9150/9110/9115, Branch Office Enterprise Media Gateway 1000B, 802.11 Wireless VoIP, IP Phones
• Unified Messaging: Nortel CallPilot
• Multimedia: Nortel Multimedia Communication Server 5100, Microsoft Live Communication Server 2005
• IP Telephony Applications: Nortel Application Gateway 1000/2000
• Contact Center - Express, Contact Center Manager Server,
• Interactive Voice Response: Nortel Media Processing Server
• Wireless: WLAN and DECT
• Management: Enterprise Telephony Manager