The information in this document is subject to change without notice. The statements, configurations, technical data, and
recommendations in this document are believed to be accurate and reliable, but are presented without express or implied
warranty. Users must take full responsibility for their applications of any products specified in this document. The
information in this document is proprietary to Nortel Networks.
Trademarks
Nortel, the Nortel logo, and the Globemark are trademarks of Nortel Networks.
Microsoft, MS, MS-DOS, Windows, and Windows NT are trademarks of Microsoft Corporation.
All other trademarks and registered trademarks are the property of their respective owners.
This system overview gives a high-level understanding of the core capabilities and features of the
Business Communications Manager 50. In addition, it indicates what capabilities and features are
not supported with the BCM50.
Audience
This overview is for installers, network administrators, and anyone else who is interested in the
BCM50.
5
Acronyms
Following is a list of acronyms used in this guide.
AcronymDescription
ADIDAnalog Direct Inward Dial
AMISAudio Messaging Interchange Specification
APACAsia Pacific
BCMBusiness Communication Manager
BRIISDN Basic Rate Interface
CALACaribbean and Latin America
CCContact Center
CCRCustom Call Routing
CDCCompact Daughter Card
CDRCall Detail Records
CIMCommon Information Model
CTIComputer Telephony Integration
DMTFDistributed Management Task Force
EUEuropean Union
FRFrame Relay
FRUField Replacable Unit
System Overview
6Chapter 1 Getting started
AcronymDescription
GASIGlobal Analog Station Interface
GASMGlobal Analog Station Module
GATIGlobal Analog Trunk Interface
GATMGlobal Analog Trunk Module
GNPSGlobal Network Product Support
GNTSGlobal Enterprise Technical Support
ICCLISDN Call Connection Limit
IPInternet Protocol
KEMKey Expansion Module
LAN CTELocal Area Network Computer Telephony Engine
MBMMedia Bay Module
MCDNMeridian Customer Defined Network
MIBManagement Information Base
MWIMessage Waiting Indication
NCGLNortel Carrier Grade Linux
NCMNetwork Configuration Manager
NCRINetwork Call Redirection Info
NRENon Recoverable Engineering
OA&MOperations, Administration and Maintenance
OEMOriginal Equipment Manufacturer
OSOperating System
PPPPoint-to-Point Protocol
PSTNPublic Switched Telephone Network
PVQMProactive Voice Quality Monitoring
QoEQuality of Experience
SFTPSecure File Transfer Protocol
SHA1Secure Hashing Algorithm 1
SIPSession Initiated Protocol
SMBSmall and Medium Business
SMESmall and Medium Enterprise
SNMPSimple Network Management Protocol
SRGSurvivable Remote Gateway
TATTrunk Anti-Tromboning
TDMTime Division Multiplexing – as found in T1 / E1 trunks
TROTrunk Route Optimization
NN40020-200NN40020-200
AcronymDescription
VoIPVoice over Internet Protocol
VPIMVoice Profile for Internet Mail
Related publications
This section provides a list of additional documents. To locate specific information, you can refer
to the Master Index of BCM50 Library.
CallPilot Fax Set Up and Operation Guide (NN40080-301)
CallPilot Message Networking Set Up and Operation Guide (NN40090-301)
Personal Call Manager User Guide (NN40020-103)
Contact Center Set Up and Operation Guide (NN40040-301)
LAN CTE Configuration Guide (NN40020-602)
Getting started Chapter 17
Call Detail Recording System Administration Guide (NN40020-605)
How to get help
This section explains how to get help for Nortel products and services.
Getting Help from the Nortel Web site
The best way to get technical support for Nortel products is from the Nortel Technical Support
Web site:
www.nortel.com/support
This site provides quick access to software, documentation, bulletins, and tools to address issues
with Nortel products. More specifically, the site enables you to:
•download software, documentation, and product bulletins
•search the Technical Support Web site and the Nortel Knowledge Base for answers to
technical issues
•sign up for automatic notification of new software and documentation for Nortel equipment
•open and manage technical support cases
Getting Help over the phone from a Nortel Solutions Center
If you don’t find the information you require on the Nortel Technical Support Web site, and have a
Nortel support contract, you can also get help over the phone from a Nortel Solutions Center.
System Overview
8Chapter 1 Getting started
In North America, call 1-800-4NORTEL (1-800-466-7835).
Outside North America, go to the following Web site to obtain the phone number for your region:
www.nortel.com/callus
Getting Help from a specialist by using an Express Routing Code
To access some Nortel Technical Solutions Centers, you can use an Express Routing Code (ERC)
to quickly route your call to a specialist in your Nortel product or service. To locate the ERC for
your product or service, go to:
www.nortel.com/erc
Getting Help through a Nortel distributor or reseller
If you purchased a service contract for your Nortel product from a distributor or authorized
reseller, contact the technical support staff for that distributor or reseller.
NN40020-200NN40020-200
Chapter 2
System Overview
Business Communications Manager 50 (BCM50) 2.0 includes a software upgrade as well as new
platform options with integrated Basic Rate Interface (BRI) trunks and new router hardware,
which is introduced to meet the European Union (EU) requirement.
BCM50 achieves:
•BCM 4.0 feature equivalence for those clients requiring features rather then capacity
•Digital mobility features
•BCM50 expansion of the global reach for the platform
9
BCM50 also delivers an upgrade to Survivable Remote Gateway 50
expanded Survivable IP User support (32 to 80 users) and feature equivalence to SRG200/400.
BCM50 continues to be a complete, converged voice, data, and feature-rich business telephony
applications solution for small business and small enterprise branch offices. BCM50 gives you the
features and applications of traditional small office PBX and key systems plus the new converged
value of IP.
In short, BCM50 delivers:
•BCM50 software upgrade from release 1.0 and release 1.0 EU
•BCM50 platforms
— with and without new routers
— with and without integrated BRI ports
•BRI port keycodes (supported in EMEA and APAC)
•New Analog DID MBMs: ADID4 & ADID8 (supported n North America, Taiwan and
Hong Kong)
•New 8X16 MBM (supported in markets where GATM8 or DSM16 are sold)
•New router maintenance (FRUs)
•SRG50 2.0 keycodes and upgrade
•NCM 3.6 RP3 software
For more information, see “BCM50 new features” on page 20.
(SRG50) that delivers
Note: In this document, BCM50 refers to the second release of BCM50.
Where required, the following distinction between the BCM50 release
versions is used:
• BCM50 1.0 is the first release of BCM50.
• BCM50 2.0 is the second release of BCM50.
System Overview
10Chapter 2 System Overview
BCM50 hardware
BCM50 is available in six configurations:
•BCM50: The compact main unit, suitable for
networks where integrated data-routing
capability is not required or networks that
already have an IP network.
•BCM50a: Includes an ADSL router and an
extra expansion port.
•BCM50e: Includes an integrated Ethernet
router and an extra expansion port.
•BCM50b: Includes an integrated Dual ISDN
S/T BRI.
•BCM50be: Includes an Ethernet router and
a Dual ISDN S/T BRI.
•BCM50ba: Includes ADSL router and a Dual
ISDN S/T BRI.
For more information about the integrated
routers, see “BCM50e and BCM50a: BCM
systems with integrated routers” on page 13 or
“BCM50b, BCM50ba, and BCM50be: BCM
systems with integrated BRIs” on page 16.
For more information about BCM50 hardware,
see the BCM50 Installation and Maintenance Guide.
BCM50 main unit
The BCM50 main unit (with telephony only) provides call processing and simple data-networking
functions. It provides connections for 12 digital telephones, four (PSTN) lines, four analog station
ports, and 4 connections for auxiliary equipment (auxiliary ringer, page relay, page output, and
music source). The BCM50 main unit does not have a router, but it does have four LAN ports: one
is the OAM port for technicians, and the other three are for basic LAN connectivity.
A main unit contains the following field-replaceable units:
•1 programmed hard disk
•1 cooling fan
•1 router card (BCM50a and BCM50e only)
Additional BCM50 hardware
The BCM50 expansion unit is a compact unit that accommodates the Media Bay Modules used by
other BCM platforms. The BCM50 main unit can support a maximum of two expansion units. See
“BCM50 expansion unit and media bay modules” on page 18 for more information.
NN40020-200NN40020-200
System Overview Chapter 211
The wallmount bracket is an inexpensive bracket designed for mounting the BCM50 or expansion
unit to a wall, see “Mounting kits” on page 19 for more information. An optional wiring card
which provides RJ-45 connectors for all main unit trunk and station interfaces is also available for
use with the wallmount bracket.
The rackmount shelf is an inexpensive shelf designed for mounting a maximum of
four BCM50 systems into a standard 19-inch rack. See “Mounting kits” on page 19 for more
information. An optional patch field that provides RJ-45 connectors for all main unit trunk and
station interfaces is also available.
BCM50 supports the complete range of IP telephony capability offered by existing BCM products.
These features are enabled through the use of keycodes and require no additional hardware:
•VoIP Gateway (H.323): up to 12 VoIP trunks
•VoIP Telephony Clients: up to 32 VoIP Telephony clients, supporting the complete range
of Nortel IP phones
•SIP trunks
BCM50 physical dimensions
BCM50 has a compact plastic enclosure that is designed so that you do not need to add additional
hardware to enable features and applications. The compact size and flexible installation options
support fast installations and accommodate the diverse environmental and physical conditions of
small businesses.
The following table describes the physical dimensions of the BCM50 main unit and expansion
unit.
DimensionsBCM50 main unitBCM50 expansion unit
Height2” (5.1 cm)2” (5.1 cm)
Width8.5” (21.6 cm)8.5” (21.6 cm)
Depth12.5” (31.8 cm)12.5” (31.8 cm)
The BCM50 main unit and expansion unit design features include:
•external power supply
•stackable units
•rubber feet which allow the unit installation on desktop or shelf
•optional wallmount bracket
•optional rackmount shelf
System Overview
12Chapter 2 System Overview
BCM50 physical interfaces
The BCM50 interfaces are designed so that you do not need additional hardware. See Figure 1 for
a graphical representation of the BCM50 interfaces.
Your BCM50 comes with these interfaces:
•Twelve digital station ports that support the complete line of Business Series Telephones.
These ports are accessible through the front pane RJ-21 connector and are enabled through
keycodes.
•Four Analog Loop Supervised Trunks. These ports are accessible through the front panel
RJ-21 connector and are enabled through keycodes.
•Four Analog Station interfaces with message waiting and CLID support. These ports are
accessible through the front panel RJ-21 connector are enabled through keycodes.
•Page and auxiliary relay output on the front panel RJ-21 connector.
•Three-port 10/100 Ethernet switch with auto sensing and auto polarity. Two of these ports
also support connecting optional expansion units.
•One 10/100 Ethernet port reserved for direct access management of the system.
•Music on hold input supported either through front panel jack or RJ-21 connector.
•USB port to enhance BCM50 management.
You can extend the capacity of your system by using the optional “BCM50 expansion unit and
media bay modules” on page 18.
Figure 1 BCM50 Front panel and interfaces
Retention clip
mounting hole
19 V DC
power
Status
power LED
Expansion ports /
OA&M
(port 0)
LAN
port 1
port 2/port 3
Reset switch
Telephony features
BCM50 comes with a full set of telephony features that can respond to the varied requirements of
your business. BCM50 supports:
Music In
USB
RJ-21 telephony connector —
analog trunks, digital stations,
analog stations, music on hold,
page out, aux relay
•the base telephony features currently provided in BCM 4.0
•Business Series Telephones including Doorphone
•analog station terminals, including phones and fax machines
NN40020-200NN40020-200
System Overview Chapter 213
IP telephony features
BCM50 offers the complete range of IP telephony features currently provided in the Business
Communications Manager product line:
•G.711 and G.729 codecs
•echo cancellation
•H.323 IP trunking and MCDN over H.323
•SIP and SIP proxy
•MCDN SIP trunking
•Gatekeeper
•T.38 Fax
Note: Support for desktop clients includes Nortel IP telephone portfolio
including i2001, i2002, and i2004 desktop sets, and i2050 Software
Phones that extend voice services to mobile and home-based employees
over the Internet. Set support includes 1120e, 1140e, 2033 and 2007.
BCM50e and BCM50a: BCM systems with integrated routers
BCM50 is available with an optional integrated ADSL or Ethernet router. These units suit the
needs of small businesses and small enterprise branch offices that require external data
networking, such as Internet access or VPN-based networking to other offices.
Two variations of the BCM50 have an integrated router, depending on the WAN interface you
require. The two variations are the BCM50e (Ethernet WAN) and BCM50a (ADSL WAN). Both
routers have these data features:
•secure Internet access
•multi-site VoIP trunking using secure VPN tunnels
•wide-area VoIP applications with remote user support
•remote IP management and support using VPN clients
Common features and capabilities
BCM50a and BCM50e share the same robust set of functionality focused on secure Internet access
and VoIP.
BCM50e and BCM50a have three additional ports of Ethernet LAN for a total of six LAN ports
for local premises use. All Ethernet ports are 10/100 Mbps autosensing and support autopolarity.
Therefore, no crossover cable is required to connect data hardware to the unit. An additional port is
provided for WAN access, either Ethernet or ADSL, depending on the model.
System Overview
14Chapter 2 System Overview
The following features make BCM50a and BCM50e attractive for small sites that want to become
Internet-capable and multi-site enterprises with many small sites. Until now, however, these sites
could not be part of the corporate WAN because of the high cost of traditional WAN connectivity
and managed service.
VPN
•10 IPSec Branch Office Tunnels (peer-to-peer)
•IPSEC client termination supported
•support for bandwidth management
•support for Dynamically addressed peers – ABOT
•support for Client Tunnel origination (not
termination) to simplify the connection to a larger
VPN Router network
•IKEv1 Main Mode
•IKEv1 Quick Mode
•Diffie-Hellman Group 1,2
•IPSec Tunnel Mode
•ESP
•NAT Traversal
NAT
•many-to-one, static, many-to-many
•port forwarding
•IPSec Pass through
•NAT support for tunnel mode IPSec tunnels
•Throughput traffic performance - 23.1 Mbps
IP Services
•DHCP client
•DHCP server with support for Nortel Internet
Telephones
•DHCP Relay supported
•DNS Proxy
•DNS with VPN client
•WAN failover supported
•PPPoE
•PPTP (ethernet router only)
•Configurable MAC address
•Clear text traffic:
— WAN to LAN 33.9 Mbps
— LAN to WAN 30.5 Mbps
Security Services
•cryptographic services
•DES and 3DES
•data authentication SHA-1
•data authentication MD-5
•authentication services
•pre-shared secrets
•security services
•stateful firewall
•intrusion detection
•AES support
•digital certificates supported
•RADIUS support
Router
•Clear text routing
•Static – through tunnel
•RIP v1 – through tunnel and clear
text
•RIP v2 – through tunnel and clear
text
NN40020-200NN40020-200
System Overview Chapter 215
BCM50e
The BCM50e in Figure 2 provides call processing and data-routing features and is suitable for
networks that require datarouting capability using an integrated Ethernet router. The WAN
interface port provides 10/100 Ethernet with autosensing and autopolarity. If you have existing or
alternative WAN access technology, you can still benefit from the VoIP features of the BCM50.
Figure 2 BCM50e front panel
BCM50a
The BCM50a in Figure 3 provides call processing, data routing features, and an integrated ADSL
modem. The BCM50a is a stand-alone set of integrated applications. With the BCM50a, you have
complete voice and Internet service with resulting efficiency and convenience.
Figure 3 BCM50a front panel
These features provide a complete, integrated Communications Server/ADSL access package for
ease of interconnecting with service-provider ADSL networks:
•ITU G.992.1 (G.DMT)
•G.992.1 Annex A
•ITU G.992.2 (G.Lite)
•ANSI T1.413 Issue 2
•DSL Forum document TR-042 ATM Transport over ADSL
•G.hs 994.1
•G.ploam G.997.1
•Autonegotiation rate adaptation
•RFC 2364 PPP over AAL5
•RFC 2684 Multiprotocol Encapsulation over ATM, both Bridged and Routed
encapsulation
•Support for British Telecom SIN 329
•Broadband IP Products requirements for End User NTE equipment, where the router and
ADSL modem functions are integrated into one device
System Overview
16Chapter 2 System Overview
•RFC 1483 Multi-protocol over AAL5
•RFC 2365 PPP over AAL5
•RFC 2516 PPPoE
•Traffic-shaping UBR, CBR
•ATM forum UNI 3.1/4.0 PVC (minimum 5 PVCs)
BCM50b, BCM50ba, and BCM50be: BCM systems with
integrated BRIs
The BCM50 system provides private network and telephony-management capability to small and
medium-sized businesses the EMEA and APAC markets. The BCM50 integrates voice and data
capabilities, IP telephony gateway functions, and data-routing features into a single telephony
system. The BCM50 is a compact system that you use to create and provide telephony applications
for use in a business environment.
Common features and capabilities
•BRI Compact Daughter Card (CDC)— Performance conforms to ITU I.430, ETSI ETS
300012, ANSI T1.605, and safety standards and lightening protection
•Additional CDC connector, for a total of two CDC slots
•Xilinx FPGA - XC3S400-4FT256C
•Integrated 8-port 10/100 Ethernet switch to support future eDSP CDC (upgraded from
5-port)
•RoHS EU compliance
•2.5” hard drive and new bracket
•Optimized position of fan cable, SATA cable, and hard-drive connector
•POL Current Limiting
•Introduce BRI and improve pack performance, and customer feature set.
•Memory parity
•Upgrade DSP and microprocessor
•GASI support
NN40020-200NN40020-200
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