172 How the Branch Office feature works3 Program the IP address, subnet mask, and gateway addresses forthe MG 1000B IP Phone.4 Program the S1 IP Address, action, and retry parameters. The S1 IPAddress is the MG 1000B Node IP Address.5 Program the S2 IP Address, action, and retry parameters. The S2 IPAddress is the main office Node IP Address.6 Program the remaining parameters. The IP Phone reboots again.—End—If the MG 1000B IP Phone can register with the main office using S1, it isredirected to the main office TPS and operates as a normal Branch User.If the MG 1000B IP Phone cannot register with the main office using S1after the number of programmed S1 retries, it uses S2 to register with themain office as a regular online main office user.Multiple Appearance DN (MADN)IP Phones with the same DN at the Branch OfficeWhen the MG 1000B CP PM processes incoming calls from a local trunk orfrom an analog (500/2500-type) or digital telephone, the CP PM determinesif the dialed DN is a Multiple Appearance DN (MADN). If any telephone inan MADN arrangement is analog or digital, or if one or more IP Phonesare registered in Local Mode at the Branch Office, the call terminatesat the Branch Office. In this case, the analog (500/2500-type) or digitaltelephones, and the IP Phones registered to the MG 1000B Core, ring. IPPhones registered to the main office do not ring.In other words, if the MG 1000B CP PM can terminate the call to anytelephone in the Branch Office that belongs to the MADN arrangement, thecall does not reroute to the main office.IP Phones with the same DN at the main officeIf a call is made to an MADN at the main office, all MADN appearances,including those on MG 1000B IP Phones in Normal Mode, ring. Anyappearance can answer the call. MADN appearances on MG 1000B IPPhones in Local Mode do not ring.Emergency servicesSupport for access to emergency services by Branch Users in Normal Modeis configured at the main office.Nortel Communication Server 1000Branch Office Installation and CommissioningNN43001-314 01.02 StandardRelease 5.0 20 June 2007Copyright © 2007, Nortel Networks.
