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Secure Remote Access Technical Solution Guide v1.0

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cards in the MG 1000T Core and all cards in up to four MG 1000T Expansions. The MG 1000T

supports Media Cards, Digital PSTN Interface Cards (E1, T1, ISDN), Analog Trunk Cards,

Service Cards and DECT Mobility Cards.

4.2.5.2.4 Nortel Remote Gateway

Nortel offers a wide variety of remote gateway solutions that extend enterprise communications to

teleworkers and remote offices. With Nortel Remote Gateway 9100 Series, the enterprise can

extend 450-plus features and system resources to those working away from the main office, while

leveraging the investment of a central corporate PBX. Using the Nortel Survivable Remote

Gateways (Release 1.0) and Survivable Remote Gateway 50, an enterprise under network failure

conditions has continued telephone services in a cost-effective manner for IP clients at even the

smallest remote sites. Using Nortel Media Gateway 1000B, up to 400 users can be distributed

across an IP WAN in a survivable environment that supports the same analog and digital line and

trunk cards and phones as that of the main site.

4.2.5.2.4.1 Nortel Media Gateway 1000B

The Media Gateway 1000B allows larger groups of users to be distributed across an IP WAN to

branch office sites with seamless feature and application transparency with a Communication

Server 1000 at the main site. It supports up to 400 IP users and provides access to an array of

PSTN trunk types as well as line interfaces located at the branch office. IP Phones at the branch

office are managed from the main site. The survivability feature allows IP Phones that are

centrally managed from the main site to fail over to survival mode, retaining all available features.

Survival mode engages automatically if the IP WAN fails and reverts back when the IP WAN

resumes normal operation.

4.2.5.2.4.2 Nortel Survivable Remote Gateway

The Nortel Survivable Remote Gateway (SRG) 1.0 (BCM 200) and SRG 1.0 (BCM 400)

seamlessly extend the services and applications of a Nortel Communication Server 1000 Series

system at a headquarters site to the smallest remote sites. In addition to the SRG 1.0 (BCM 200)

and the SRG 1.0 (BCM 400), there is a mini model for the smaller branch office, known as the

Nortel Survivable Remote Gateway (SRG) 50. Introduced with Communication Server 1000

Software Release 4.5, it is cost optimized for sites ranging from between 5 and 32 users.

While the Nortel SRG 1.0 platform is based on the market-leading small site IP Telephony

solution and Nortel Business Communications Manager 200 and 400, the Nortel Survivable

Remote Gateway 50 is based on the BCM 50. The SRG series has been designed to provide

continued telephony services for IP clients under network failure conditions – and to do so in a

very cost-effective manner at smaller locations.

The SRG portfolio is not only cost effective at smaller sites, but also provides highly reliable

solutions that include the intelligence to drive Nortel IP terminals while providing IP routing

capabilities and a suite of PSTN interfaces to enable local PSTN access. It is capable of

addressing the needs of smaller branch offices ranging in size from 5 to up to 80 users.

4.2.5.2.4.3 Nortel Remote Gateway 9100 series

The award-winning Nortel Remote Gateway 9100 Series provides an ideal solution for extending

cost-effective, high-quality communications to teleworkers and remote offices. The Nortel Remote

Gateway 9115 extends the features and functions of a Nortel Meridian 1 PBX, Meridian SL-100,

or Communication Server 1000 (CS 1000) system out to a single telephone at a small remote

office or telecommuter home office, utilizing a standard IP-based network connection and an

analog PSTN telephone line and a Nortel Meridian digital telephone. The Nortel Remote Gateway

9150 is a powerful option for extending these features and functions to remote branch offices

using up to 32 Nortel Meridian digital telephones and a standard IP-based connection and PSTN

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