User guide

Help Contents > Getting Started with the ISDN gateway > Getting Started with the ISDN gateway

Getting Started with the ISDN gateway

Ensure you have correctly completed the physical setup of the ISDN gateway following the instructions contained in the

installation guide that accompanied the unit. You must also ensure that your endpoints and MCU are correctly configured

to operate with the ISDN gateway, for more information, refer to the Quick Start guide on the CD.

Before you can make calls using the ISDN gateway, you need to complete the setup of the unit using the web interface

as follows:

1. Log into the ISDN gateway: Use your browser to navigate to the IP address of the ISDN gateway. Click

Change log in and enter the user name 'admin' with no password. Note that Codian recommends that you

change the admin user account to use a password as soon as possible.

2. Set up the ISDN interfaces: Go to Home > Settings > ISDN:

a. Select the ISDN interface type to match that of your installation; E1 is typically used in the UK and

mainline Europe, T1 in North America, and J1 in Japan.

b. Select the E1 CRC-4 option as required by your network. Typically, if you have an E1 ISDN network,

enable this option.

c. Click Apply changes. If you made any changes on this page, you must restart the ISDN gateway.

(Go to Home > Settings > Shutdown and click Shut down ISDN GW.)

3. Configure ISDN ports: Go to Home > Settings > ISDN ports:

a. Set low and high channels:

■ If you have a fully-populated PRI (this is the normal case) set Low channel to '1' for all

network types and High channel to '31' for E1 networks, and to '23' for T1 or J1.

■ If you have a fractional PRI, where your provider offers a reduced number of B-channels,

enter alternative values as appropriate.

b. Set the channel search order: When making calls, the ISDN gateway examines which B-channels

are free before placing a call. This search can be performed starting with the high channel and

working down, or starting with the low channel and working up. Your ISDN provider will be able to

advise which scheme to use, but the choice is not critical.

c. Click Apply changes and then, if required, repeat the above steps to configure further ISDN ports.

Select which port you wish to configure using the numbered links at the top right of the page.

4. Configure the dial plan: The default behavior of the unit is to reject all calls. You must configure a dial plan

to allow permitted calls to be placed. The simplest configuration is to create a dial plan that will connect any 'IP

to ISDN' call that has been routed to the ISDN gateway to the number that the caller has dialed (using any

free enabled port) and that will connect any 'ISDN to IP' call to the auto attendant of your MCU:

a. Go to Home > Dial plan > IP to ISDN and click Add rule.

b. For Condition, select Match any called number.

c. For Action, select Call with the original called number.

d. Leave the other values unchanged. Click Add rule to add the rule to the dial plan.

e. Now go to Home > Dial plan > ISDN to IP, and click Add rule.

f. For Condition, select Match any called number.

g. For Action, select Call this number and enter the IP address of your MCU.

h. Leave the other values unchanged. Click Add rule to add the rule to the dial plan.

Note: for more information about dial plans, refer to

Understanding the Dial Plan.