Specifications

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Chapter 13: Topology – Network Services
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Alcatel-Lucent Enterprise Communication Solutions
April 2014 Offer
2.1.3 TDM and Appliance Server example
This configuration shows a full TDM system in the main location, but uses an IPAS placed in a secure
location. In this case, the number of Crystal chains is limited to two. All branch offices are equipped
with IP (Crystal) media gateways.
2.2 Interconnecting IP media gateways
The Communication Server architecture requires a voice enabled IP network interconnecting each
business site (physical connections often based on routers over frame relay or leased lines).
Typically, IPMGs are interconnected through the data network (LAN or WAN). Optical fibers can also
be used (avoids using the customer data network in campus network). This is based on the use of
integrated LAN boards (LAN 16) and devices called media converters, which convert 10/100BaseT
Ethernet for transmission over fiber (these devices are not provided by Alcatel-Lucent).
Remote sites can be equipped with:
– IP telephony only, with small analog VoIP gateways for fax support (for example,
Audiocodes MP1x)
– IP telephones as well as complementary media gateways for legacy interfaces (NDDI /
NDID analog networks, Z (analog), digital T0, T1, or T2)
– Media gateways used to connect digital phones, fax machines, analog phones, and DECT
base stations to the network
The remote equipment is controlled over the IP network (typically a WAN). All inter-site connections
use VoIP. In most cases, a typical remote site configuration has between one and 50 extensions.