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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 SBC is not configured with tone profiles, inter-working of calls are accomplished by additional configurations. For more information on LMSD interworking, refer to _Key FeaturesLMSD Interworking without Tones.

Configuring on EMA

To configure LMSD interworking without tones on the EMA:

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