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It is, however, strongly recommended that you do not edit the dialplan within the NSG product and to build the routing logic around NSG, as any involuntary dialplan adjustments can bring down your SS7 network.  The following information is meant in those scenarios where your only option is to adjust the dialplan of NSG.

• Adding national (0) or international (00) prefix on inbound calls

• Forcing NADI values on outbound calls (sip-->ss7) to national/international

• prefixing call before routing to ss7

• Routing inbound calls (ss7->sip) based on the E1/T1 port