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Concepts and Principles of Operation
17
DHCP
Managing IP addresses in an organization is often a headache for the MIS staffs. To ease the IP
address management, the Dynamic Host Configuration Protocol (DHCP) is invented by IETF. DHCP
protocol works in a client server configuration. One or more DHCP servers may be installed in the
network. A workstation running DHCP client software (eg. Windows 95), when configured to request
IP addresses from the network, will send a DHCP request to the network asking for IP address
assignment. In addition to assigning the IP address, the DHCP server can also provide other TCP/IP
configuration data such as IP sub-net mask, default gateway IP address, DNS server IP address(s).
Hypertec ISDN 10T Router with DHCP enabled, can function as a DHCP server.
Voice Communication Service
Voice Preemption
If you pick up a phone while a 2-channel data call (Multilink PPP bundle) is active, the Hypertec
Router drops one of its data links to service the voice call unless the preemption is configured as
disabled. An AT&T 5ESS switch limitation prevents users of AT&T Customer Multi-point or Point-to-
Point service from receiving voice calls, when both data channels are in use. Outgoing calls are not
affected by this switch limitation, because they are controlled locally at the Hypertec Router . If you
are using AT&T Multi-point or Point-to-Point service, and you want to make sure that voice calls are
received, you should configure the link encapsulation protocol to PPP for both Internet and Intranet
profile. However, this limits the Hypertec Router to 1-channel data calls, so each data call can handle a
maximum of 64 kbps. The voice call will not be accepted if there is two 1-channel data calls in active.
Basic Rate ISDN Provisioning for United States and Canada
Introduction
This document outlines the steps required to successfully order the correct BRI ISDN service from your
service provider for the Hyperte Router .
Line Provisioning Service
Line provisioning service can supply the ISDN provisioning information you require. This information
is available at the following number (US and Canada only):
1-408-867-2045
Ordering the ISDN Line
You can order many different variants of ISDN. To ensure that you get the correct variant for the
Hypertec Router, you need to give your service provider certain information. In return, they will tell
you the correct parameters to use when configuring the Hypertec Router .