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The Legacy Mobile Station Domain (LMSD) or 3GPP2 defines the Session Initiation Protocol (SIP) inter-working with CDMA network for IP-based trunking between CDMA Mobile Switching Centers (MSC) to enable Transcoder Free Operations (TrFO). When the SBC is not configured with tone profiles, inter-working of calls are call interworking is accomplished by additional configurations. For more information on LMSD interworking, refer to to LMSD Interworking without Tones.

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Configure from EMA

To configure LMSD interworking without tones on the EMA:

1. Log on to the EMS SWe GUI. The following screen appears:

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   0 Figure 1 EMS GUI Home Page
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2. On the navigation pane, select Element Management > SBX Manager.

3. Select the registered SBC manager to configure.

4. onto the EMA.

5. From the menu bar, select All, and then from the navigation panel, select Select All > Address Context > Zone > SIP Trunk Group >Signaling.
   The Signaling page appears:

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   0 Figure 1 Signaling
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   screen displays.
6. Choose your Address Context, Zone and SIP Trunk Group of interest.
7. Enable Stop Lmsd Tone On Update.
8. Click Save.

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Configure PSX from EMS

To configure LMSD interworking without tones on the PSX Manager:

1. Log on to the EMS SWe GUI. The following screen appears:captiononto the

   Spacevars
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   Figure

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   1EMS GUI Home Page

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   On .

2. From the navigation panepanel, select Element Management > PSX Manager. select Device Management > Nodes.
3. Select the registered Master PSX device, then choose Configure from the "Select Action" drop-down menu.
   The RibbonPSX Configuration Manager screen appearsdisplays.
4. Select the IP Signaling Profile from the Entity drop-down menu.
   The IP Signaling Profiles are listed.

5. Select the Default_LMSD profile.

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   On bottom-left corner of the screen, click New to create a new profile and enter a name for IP Signaling Profile.

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   0 Figure 1 IP Signaling Profile
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6. Select Select the Accept Alert Info check box.
7. Click Save.

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