Knowledge Base articles about Voice-over-IP (VoIP) with LCOS

Title
Troubleshooting guide: Firewall check of a SIP PBX via the Internet is rejected by the LANCOM router
Explaining VoIP trace: Outbound phone call on a single account with an ISDN subscriber
Explaining VoIP trace: Inbound phone call on a single account with an ISDN subscriber
Troubleshooting: After updating to LCOS 10.42, problems with telephony occur when using a SIP PBX
Troubleshooting guide: Outgoing data connection of an ISDN subcriber (Clearmode) via a SIP line doesn't work
Deactivation or restriction of unused “Application Layer Gateways”
Setting up a “dynamic SIP line” on a LANCOM router
Pin assignment of a Twin adapter for analog telephones for the LANCOM 1793x series and the 883+ VoIP
Voice Call Manager - Configuration of a hunt group for automatic assignment of incoming calls to multiple subscribers
Prevent outgoing calls to particular telephone numbers

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