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5.2.2.4. Called HFA IP phones are not reachable, because of system failure errors, they moved their logon location from OpenScape 4000 to another OpenScape 400 (MWI Indication) Previous topic Parent topic Child topic Next topic

  • Scenario
    HFA IP phones are normally registered at a OpenScape 4000 node with Xpressions. Special authorized HFA IP phones can move their logon location from OpenScape 4000 to another OpenScape 4000 node in case of IP errors.
  • Main goal
    The goal is, to reach this HFA IP phones in their new logon location via tie trunk access under their individual (modified) extension numbers and the HFA IP phones will be supplied with MWI update information of the Xpressions server.
    The MWI led will be switched on or switched off at the HFA subscriber. The HFA subscriber now has the possibility to call the Xpression server from the alternate OpenScape 4000 via tie trunk access in order to pick up its voice messages.
    If the HFA subscriber has different numbers in default node and alternate node, it may be necessary to use the mailbox number of the default node also when picking up the voice messages out of alternate node.
    Alternate Routing on Error via tie trunks to another OpenScape 4000 should be used very restrictive. Furthermore, the administration should only done subscriber individual and not source group related.
  • Administration
    In the node with Xpression allocation, following administration has to be done:
    • For HFA subscriber, it is necessary to set a mark for moving logon location
      CHANGE-SDAT:STNO=4711, TYPE=DATA1, MVHFAIP=YES;
    • In order to avoid network loops, it is necessary to set the partner gateway IP address for that sourcegroup, that is allocated to the related HFA subscribers.
      ADD-APRT:TYPE=ALTERR, SRCGRP=1, ALRTYPE=OOS, GWIPADR=<ip_address_of_gw>; 
    • For the HFA subscriber, it is necessary to administer an alternate routing destination number, which leads via tie trunk to an alternate OpenScape 4000 node.
      ADD-SDAT:STNO=4711, TYPE=DATA1, STNOOOS=723-4711;
    • There is an other possibility, to administer an alternate routing destination number for the complete source group, the HFA subscriber is a member of (not recommended).
      ADD-APRT:TYPE=ALTERR, SRCGRP=1, ALRTYPE=OOS, ALTRTNR=723, GWIPADR=<ip_address_of_gw>, EXTNO=4;
    In the node, to which the alternate routing on error points, following administrations have to be done:
    It is necessary to install a relation between subscriber and XPRESSION. In this case, the subscriber is that number with what the HFA subscriber from the node with the XPRESSION is logged on in the alternate node.
    CREATE-RICHT:MODE=PM,IDX=1, SAN=nnnnn, NAME=PHONEMAIL;
    CHANGE-SBCSU: STNO=4711, PMIDX=1;
    
    Interdependencies with other Requests:
    Alternate routing on error for MWI uses the functionality of common Alternate routing on error for HFA phone, that can change its logon location in case of IP quality problems (loss of LAN connection etc.) This means, that this feature only can be used, if the basic Alternate routing on error works also fine.