Mediant 1000 Analog & Digital
Fast Track Guide 26 Document #: LTRT-83501
4. To modify the selected trunk’s parameters, click the Stop Trunk button; the trunk is stopped
and the status of the parameter ‘Trunk Configuration State’ changes to ‘Inactive’. The
parameters are no longer grayed and can be modified. The
Apply Trunk Settings button
appears at the bottom of the screen. (When all trunks are stopped, the
Apply to all Trunks
button also appears at the bottom of the screen.)
Note: If the trunk can’t be stopped because it provides the gateway’s clock (assuming
the Mediant 1000 is synchronized with the E1/T1 clock), assign a different E1/T1
trunk to provide the gateway’s clock or enable ‘TDM Bus PSTN Auto Clock’ on
the TDM Bus Settings screen.
To assign a different E1/T1 trunk that provides the gateway’s clock, access the
‘TDM Bus Setting’ screen and change the ‘TDM Bus Local Reference’ number to
any other trunk number (this operation can be performed on-the-fly).
5. Select the ‘Protocol Type’. Different trunks can be defined with different protocols (CAS or
ISDN variants) on the same gateway (subject to the constraints in the Mediant 1000 Release
Notes).
Note: When modifying the ‘Protocol Type’ field, the available parameters are
automatically updated according to the selected protocol.
6. From the ‘Framing Method’ drop-down list, select the required Framing method (for E1
trunks, always set the Framing Method to ‘Extended Super Frame’).
7. From the ‘Clock Master’ drop-down list, select the trunk clock source. Choose either
‘Recovered’ (the clock is recovered from the trunk -- default) or ‘Generated’ (the trunk’s clock
source is provided by the internal TDM bus clock source, according to the parameter ‘TDM
Bus Clock Source’). For detailed information on the parameter ‘TDM Bus Clock Source’,
refer to the Mediant 1000 User’s Manual.
8. From the ‘Line Code’ drop-down list, select the required Line Code: ‘B8ZS’ (bipolar 8-zero
substitution) for T1; ‘HDB3’ (high-density bipolar 3) for E1; or ‘AMI’ (for both T1 and E1).
9. From the ‘ISDN Termination Side’ drop-down list (only for ISDN protocols), select ‘User Side’
when PSTN or PBX side is configured as ‘Network side’ and vice versa. If the Mediant 1000
ISDN termination side is unknown, choose ‘User Side’, and then open the 'Alarms' screen
(by clicking the Home button). If the D-channel alarm is indicated, choose ‘Network Side’.
10. To configure the different behavior bits, enter the exact hexadecimal bits value in the field to
the right of the relevant behavior parameter, or directly configure each bit field by performing
the following:
a. Click the arrow button (-->) to the right of the relevant behavior parameter.
b. Modify each bit field according to your requirements.
c. Click the Submit button to save your changes.
11. After modifying the parameters:
• To apply the changes to the selected trunk only, click the Apply Trunk Settings button.
• To apply the changes to all the trunks, click the Apply to all Trunks button.
The screen is refreshed and parameters become read-only (indicated by being grayed). The
Stop Trunk button appears at the bottom of the screen.
12. Access the ‘TDM Bus Settings’ screen (Advanced Configuration > TDM Bus Settings).
From the ‘PCM Law Select’ drop-down list, select ‘Alaw’ for E1 and ‘MuLaw’ for T1 trunks.
13. To save the changes so they are available after a power fail, perform the following:
a. On the main menu bar, click the Maintenance button; the 'Maintenance Actions' screen
is displayed.
b. From the 'Burn to FLASH' drop-down list, select 'Yes', and then click the Reset button;
a confirmation message appears when the save is complete.
For detailed information on configuring Mediant 1000 trunks, refer to Mediant 1000 User’s
Manual.
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