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In the Calls gateway overview page, all calls actively being made can be monitored. This is advantageous for diagnostic purposes in particular, since the existence of possible network problems, for example, is immediately visible (see Coder):

  • Interfaces: Display of the calling interface.
  • Protocol: Display of the protocol used on the calling side. The protocol ist displayed in the format <protocol>:<mode>. protocol is the negotiated protocol flavour. This can be
    • H323EFC - H.323 with extended fastconnect
    • H323FC - H.323 with fastconnect
    • H323/H245T - H.323 with H.245 tunneling
    • H323/H245 - H.323 with seperat H.245
    • SIP - SIP.
  • mode indicates the operating mode of the given protocol. This can be
    • TRANSIT - Media Negotiation is forwarded transparently
    • LOCAL - protocol entity acts as endpoint
    • REMOTE - media negotiation is translated to other protocol
    • RELAY - media relay is performed
    • PAUSE - protocol entity is in paused state.
  • Coders: Display of the coder used on the calling side, for example, G711AB(2,0,0). The values in brackets have the following meaning for voice coders, in order:
    • Round trip = Transit time in ms of a data packet from A to B and back again.
    • Jitter = Latency time in ms (time interval from the end of an event up to the start of the response).
    • Loss = Number of lost packets (packet loss).
  • Coders: For T.38 calls the values in brackets have a different meaning:
    • Pages = Number of transmitted pages.
    • Speed = Speed in bits/seconds for the fax highspeed data.
    • Loss = Number of lost packets (packet loss).
  • Number: Display of the called number.
  • State: Possible states: Alerting, Calling, Connected, Disconnecting.
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