B. General information
The Cisco SPA112 connects analogue devices with IP-based data networks.
A POTS (Plain Old Telephone Service Port) on the SPA112 is used to connect an existing analogue device. You provide the connection from your network (LAN) at the office to the telephone system via a 100BaseT RJ-45 Ethernet interface (LAN-WAN).
The SPA112 converts voice communication into data packets for transmission via your IP network. Thanks to the international standards for voice- and data networks, the SPA112 ensures reliable operation.
There are specific network requirements, to ensure smooth communication with the telephone system. For more information on network requirements/configuration, please refer to the “Plug & Play leaflet”.
Many multifunction devices and modern fax devices are capable of various settings for specific transmission standards that might disturb the adapter. As a result a one-hundred-percent functionality cannot be guaranteed.
Trying to send a fax, the device will give an error message which varies depending on the device model and producer.
Furthermore, deactivate the following settings:
- Note that a fax number dialed needs an prefix number (e.g. 9 for UK).
- Deactivate V.34
- Set the maximum bit rate to 9600 bps (alternatively marked as 9.6k)
- Deactivate the function "Use on extension.
- Decativate automatic telephone ringtone
- Deactivate automatic prefix number
- Enable port range 4000-4999 in your firewall
Check in the manual of your fax device, if the above mentioned settings are applicable for your fax and how to configure the settings. In case of doubt, ask the producer directly. Many manufacturers provide the configuration details on their website in the FAQ or Troubleshooting section. Pay attention to any note concerning sending faxes via VoIP.
It is fundamentally necessary to set the maximum bitrate to 9600 in the administration portal!