FXS Telephony Implementation
When the FXS port on an FXO gateway is connected to an analog phone, the following basic telephony operations can typically be performed:
Placing a Phone Call
To make the outgoing calls using your HT841/HT881
1. Pick up the handset of the connected phone.
2. Dial the number directly and wait for 4 seconds (Default “No Key Entry Timeout”); or
3. Dial the number directly and press # (Use # as dial key” must be configured in web configuration).
Examples:
1. Dial an extension directly on the same proxy, (e.g. 1008), and then press the # or wait for 4 seconds.
2. Dial an outside number (e.g. (626) 666-7890), first enter the prefix number (usually 1+ or international code) followed by the phone number.
Press # or wait for 4 seconds. Check with your VoIP service provider for further details on prefix numbers.
Direct IP Calls
Direct IP calling allows two parties, that is, an FXS Port with an analog phone and another VoIP Device, to talk to each other in an ad hoc fashion
without a SIP proxy.
Elements necessary to completing a Direct IP Call:
Both HT841/HT881 and other VoIP Devices, have public IP addresses, or
Both HT841/HT881 and other VoIP Devices are on the same LAN using private IP addresses, or
Both HT841/HT881 and other VoIP Devices can be connected through a router using public or private IP addresses (with necessary port
forwarding or DMZ).
The HT841/HT881 supports two ways to make Direct IP Calling:
Using IVR
1. Pick up the analog phone then access the voice menu prompt by dialing “***”
2. Dial “47” to access the direct IP call menu
3. Enter the IP address after the dial tone and voice prompt “Direct IP Calling”
Using Star Code
1. Pick up the analog phone then dial “*47”
2. Enter the target IP address.
Examples of Direct IP Calls:
a) If the target IP address is 192.168.0.160, the dialing convention is *47 or Voice Prompt with option 47, then 192*168*0*160, followed by
pressing the “#” key if it is configured as a send key or wait 4 seconds. In this case, the default destination port 5060 is used if no port is specified
b) If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be: *47 or Voice Prompt with option 47, then
192*168*0*160*5062 followed by pressing the “#” key if it is configured as a send key or wait for 4 seconds.
Note: When completing a direct IP call, the “Use Random SIP/RTP Port” should be set to “NO”.
CALL FEATURES
No dial tone will be played between steps 1 and 2 and destination ports can be specified using “*” (encoding for “:”) followed by the port number.
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