Common Support Hints

Known problems

Current: Activation problems with the LANCOM Advanced VPN Client [12/29/2008]
A mistake in the production process has caused a number of VPN Clients to be shipped with an incorrect combination of serial number and license key. If you are having problems with the activation of your VPN Client, you can generate the correct combination of your serial and licence number here.

Limited support of unattended call transfer

With the LANCOM VP-100, a call on hold can be transferred unattended by entering the target telephone number and immediately pressing the "Transfer" key. Analog or ISDN telephones generally do not have a special key or menu option for direct unattended call transfer.

Solution:

A full implementation requires a control mechanism, such as hanging-up while dialing or ringing from analog or ISDN telephones. This will be implemented in a future version of LCOS.

Call forwarding (i.e. automatic call transfer) from various SIP devices functions with restrictions only, or not at all

For some SIP phones, pressing the hash key ("#") while dialing with an off-hook handset or with an activated speakerphone function triggers immediate dialing. This means that controlling PBXs with the hash key is either not possible, or it can be used for the first character only.

The LANCOM Advanced VoIP Client does not signal an asterisk (*) in the SIP-URI when establishing a call if the sequence ends in a hash.

Solution:

Generally speaking, telephone numbers that include control codes (keypad facilities) can be entered into SIP telephones even when the handset is on-hook or when the speakerphone is not active. Picking up the handset or activating the speakerphone then initiates dialing. This method is suitable for controlling PBX functions.

The VoIP Call Manager now also supports control by this method if the keypad-facility control code does not end with the hash "#" sign. In this way, keypad facilities can be used with the LANCOM Advanced VoIP Client as well.

Examples

Set up immediate call forwarding to the telephone number 504:

*21*504# can alternatively be actvated with *21*504

Temporarily disable immediate call forwarding:

#22# can alternatively be set with #22

ISDN facilities for automatic call forwarding not supported

Automatic call forwarding with ISDN telephones cannot be operated via the ISDN facilities (functional protocol) but by entering keypad facility code sequences instead, e.g. "#21#".

Solution:

An upgrade to include the ISDN functional protocol is planned for a future version of LCOS. Please use the code sequences (keypad facilities) that are described in the documentation.

Reboot when a configuration is changed during a telephone call

If the configuration is changed during a telephone call, the router reboots under certain conditions.

Solution:

The problem will be fixed in a following release update of LCOS.

Changes in the COM Port server due to compliance with RCF 2217 may lead to communication failure in some cases

As from LCOS 7.70 a change in handling was introduced to comply with RFC 2217. This may lead to communication problems with some client software emulating a virtual COM port.

Solution:

The following KnowledgeBase document describes a workaround, how to read out e.g. phone system information using an LCOS 7.70, though.

WLC: Standalone operation of access points [07/01/2010]
This document describes the function "Standalone operation" .

ARF: Setting up local networks with different network IDs [13/11/2009]
This document outlines the parameters and functions of the "Advanced Routing and Forwarding" feature.

LANCOM products and Windows 7 [04/09/2009]
Here you learn more about the compatibility of LANCOM products and Windows 7.

Changes to the Public Spot user management with LCOS 7.70 [12/08/2009]
This document describes the changes to the Public Spot user management with LCOS 7.70.