Mediant 1000 Digital
Fast Track Guide 24 Document #: LTRT-63802
3. To configure the parameters of a specific trunk, from the trunks displayed on the top, select
the trunk you want to configure by clicking the Trunk’s Status indicator. The first parameter
named ‘Trunk ID’ changes according to the trunk you click. The parameters displayed are for
the selected trunk only.
4. To modify the selected trunk’s parameters, click the Stop Trunk button; the trunk is stopped,
the status of the parameter ‘Trunk Configuration State’ changes to ‘Non Active’, the
parameters are no longer grayed and can be modified and 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’ you use. Note that 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 menu is automatically updated
according to the selected protocol (ISDN, CAS or Transparent). Additional
parameters are appropriate to the selected protocol type.
6. In the ‘Framing Method’ field, select the ‘Framing Method’ you use (for E1 trunks, always set
the Framing Method to ‘Extended Super Frame’).
7. In the ‘Clock Master’ field, select the trunk clock source from the drop-down list. 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 digital Mediant 1000 User’s Manual.
8. In the ‘Line Code’ field, select the Line Code. Choose either ‘B8ZS’ (bipolar 8-zero
substitution) for T1 trunks only; ‘HDB3’ (high-density bipolar 3) for E1 trunks only; or ‘AMI’
(for both T1 and E1).
9. In the ‘ISDN Termination Side’ field (applicable only to ISDN protocols), select ‘User Side’
when the PSTN or PBX side is configured as ‘Network side’, and vice-versa. If you don’t
know the Mediant 1000 ISDN termination side, choose ‘User Side’ and refer to the ‘Status &
Diagnostics>Channel Status’ screen. If the D-channel alarm is indicated, choose ‘Network
Side’.
10. To configure the different behavior bits: either enter the exact hexadecimal value of the bits
in the field to the right of the relevant behavior parameter, or directly configure each bit field
by completing the following steps:
• Click the arrow button (-->) to the right of the relevant behavior parameter; a new
window appears.
• Modify each bit field according to your requirements.
• Click the Submit button to save your changes.
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