Page 34 of 254 OverviewNN43001-308 Standard 01.02 May 2007ESN Access CodesESN data is configured with two Access Codes, called AC1 and AC2. AC1normally applies to long distance calls, whether placed on or off thecustomer’s private network (for example, dialing “6”). AC2 normally appliesto local calls (for example, “9”). For more information, see ElectronicSwitched Network Reference—Signaling and Transmission Guidelines(NN43001-280).Music on HoldFor SRG users in Normal Mode, the main office provides music to the user ifMusic on Hold is provisioned. The use of the G.729A/AB codec between themain office and the branch office may impact the music quality.G.723 codec is not supported on SRG200/400 Release 1.5.Branch office and SRG200/400 Release 1.5 terminologyTable 2 lists configuration-related terms and contexts where branch officeand SRG200/400 Release 1.5 terminology differ.Table 2:Branch office and SRG200/400 Release 1.5 terminology (Part 1 of 2)Term or context Branch office SRG 200/400 Release 1.5dialing plan on-net/off-net dialing Private/Public networkdialingrouting distant steering codes (DSC),Trunk steering codes (TSC),Local steering codes (LSC)call routing, destinationcodes, line pool accesscodesDigit manipulation table dial-out digits (routing)alternate routing selection Facility Restriction Level (FRL) scheduled call routingType of number CDP/UDP/TNDN CDP/UDP/no equivalent