Version 6.2 377 February 2011
SIP User's Manual 5. EMS-Based Management
3. Select a trunk, and then in the Configuration pane, click Trunk SIP Frame; the Trunk
SIP Provisioning screen is displayed with the General Settings tab selected.
Figure 5-7: General Settings Screen
4. From the 'Protocol Type' drop-down list, select the required protocol.
5. From the 'Framing Method' drop-down list, select the required framing method. For
E1, always set this parameter to Extended Super Frame.
6. From the 'Clock Master' drop-down list, set the Clock Master to one of the following
values:
• Clock Master OFF: the Clock Source is recovered from the Trunk line.
• Clock Master ON: the Clock Source is provided by the internal TDM bus clock
source, according to the parameter TDM Bus Clock Source.
7. Select the other tabs to continue configuring the PSTN trunks.
Notes:
• When changing 'Protocol Type' from 'None' to any other protocol, reset
the device. You're not required to reset the device when making
subsequent changes to 'Protocol Type'.
• Most Trunk provisioning parameters require that a Trunk Lock / Unlock
be performed before / after configuring them. When performing a Lock
action, all active calls are dropped and users cannot make new calls.
This is Trunk Out Of Service mode.
• Upon initial configuration, do not change the Admin State of the trunks to
unlock (it is changed automatically after the device is reset in EMS).
5.3.2 Configuring ISDN NFAS
This section describes how to configure ISDN-NFAS trunks as an initial configuration.
In regular T1 ISDN trunks, a single 64 kbps channel carries signaling for the other 23 B-
channels of that particular T1 trunk. This channel is called the D-channel and usually
resides on timeslot #24. The ISDN Non-Facility Associated Signaling (NFAS) feature
enables the use of a single D-channel to control multiple PRI interfaces.
To Next Page
Loading...
