Nortel Networks SRG50 Troubleshooting fallback to local mode, IP telephones manual redirection

Models: SRG50

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86Chapter 8 Troubleshooting

The actual IP telephone set type at the SRG does not match MOTN set type at the main office.

The user id is registered and not idle.

The user id entry in the gatekeeper database points back to the originating node.

Troubleshooting fallback to local mode

If the system reverts to local mode and the problem is not the WAN link to the main office, check for:

1IP telephone firmware discrepancies

The SRG supports automatic firmware updates (see CS 1000 considerations on page 33). However, the possibility exists that a non-network reversion to local mode is caused when the IP telephone firmware has been updated on the main office and not on the SRG.

Check the IP Terminal Details tab (see IP terminal details on page 84) for this Status:

Firmware is Out of Sync with the Main Office Call Server

The preferred way of handling firmware upgrades is to install the patch onto the SRG first, then on the main office equipment.

When the IP telephone firmware is updated on the main office, the main office redirects all SRG IP telephones back to the SRG for a firmware upgrade. If the SRG has already been patched with the new firmware, the telephone is upgraded when it registers with the SRG. Once the telephone has the new firmware, the system automatically allows the telephone to reregister with the main office. If the correct firmware cannot be applied, for example because the SRG has not been upgraded with the new firmware, the telephone is redirected back to the main office.

2Gatekeeper failure

If an IP telephone fails to establish communication with the gatekeeper when it tries to register to the main office, the telephone remains registered to the SRG and stays in local mode.

Troubleshoot the problem by checking the settings made when implementing the CS 1000 information for the SRG on page 44 and Fallback configuration on page 72. If you make changes, manually redirect the telephones (IP telephones manual redirection on page 86, below).

IP telephones manual redirection

To manually redirect an IP telephone to the main office

1Access the Configuration > Telephony > Sets > Active Sets > IP Terminal Details.

2Click the telephone listing that you want to redirect to normal mode.

NN40140-500

Page 86
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Nortel Networks SRG50 Troubleshooting fallback to local mode, IP telephones manual redirection, Gatekeeper failure