Connecting The Isdn Gateway; Your Isdn Connection; Step One: Connect To Ethernet Port A; Step Two: Connect To The Isdn Ports - Cisco TelePresence ISDN GW MSE 8321 Getting Started

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Connecting the ISDN gateway

To reduce the risk of fire, use only 26 AWG or larger telecommunication

line cord.

Outside North America

Check with your network provider to ensure that your incoming ISDN PRI line is

terminated in an NTU/CSU (Network Termination Unit/ Channel Service Unit). If

it is not, then seek their advice regarding the provisioning of such a device. Do not

connect the ISDN gateway directly to an external ISDN line.

Within North America

If your network provider has not terminated all of your incoming ISDN PRI lines

with an NTU/CSU, Cisco recommends that you install a suitably approved CSU to

protect the ISDN gateway from damage by surges on your ISDN PRI lines.

Connect an Ethernet cable from Ethernet Port A to an Ethernet switch (rather than a

hub, to minimize interference from other devices on the network). The Ethernet

port is a 10/100/1000 Mbps auto-sensing connection.

Only connect to Ethernet Port A, as all initial configuration must be done

on this port. Do not connect anything to Ethernet Port B.

The ISDN gateway uses a standard RJ48C ISDN interface for each PRI port. Use a

single straight-through STP patch cable to connect each PRI port on the ISDN

gateway to your ISDN connection.

For information about the behavior of the ISDN port LEDs, refer to Table 1, ISDN

gateway LED behavior, on page 4.

For D-channel signaling to be established, the ISDN gateway must have

found and synchronized with the ISDN network clock. In some

installations, you may have to explicitly request your ISDN provider to

enable the network clock before the link will be established.

Connecting the ISDN gateway

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