Welltech ePBX-100A-128 - Manual (Page 17)

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with such DialPlan can call to Extension and Route Level with R1, R2, R3 and R4.
Note:
•
For more information about Route Level, please refer to the user manual: 3.1.6.1
Outgoing Call Rule.
„ Keypad: User can select Keypad type to be RFC2833, In-band, or SIP-Info and Auto.
You can choose Auto to auto select the Keypad type. Choose RFC2833, Inband or
SIP-Info here will force the Extension use RFC2833, Inband or SIP-Info only and the
setting should be also match the Keypad setting of Trunk device.
„ NAT Traversal: If the Trunk device is behind a device performing NAT, such as firewall
or router, and need to register to ePBX-100A-128 on public network, then user has to
enable this function. Enable NAT Traversal to force ePBX-100A-128 to ignore the
contact information for the Trunk and use the address from which the packets are
being received.
„ RTP Mode: User can choose for two type of RTP mode, one is Routed Mode another
is Direct Mode. The voice media will be routed “Peer-to-Peer” if two clients are both
setting to Direct Mode. This way will improve the voice quality and reduce the
performance wastage of the ePBX-100A-128.
Note:
•
If one peer set to Direct Mode but another peer set to Routed Mode, the result will
become to Routed Mode.
•
Voice media will still go through the ePBX-100A-128 if the ePBX-100A-128 needs
to detect DTMF.
•
If you enable the NAT Traversal function for Extension, the RTP mode will change
to Routed Mode directly; this way will avoid the “one-way voice” or “no voice
issue” of VoIP.
• If the both peers are under different subnet, or one peer is under Public IP but
another one is under Private IP, we strongly suggest you to set the RTP mode
to Routed Mode to avoid some unexpected voice problems.
„ Port: You can use this to define the SIP signal port if you want to listen on a
nonstandard SIP signal port.
„ External Server Address: This field will allow you to set the domain in the SIP From
URI. Setting this will avoid some unexpected issue if the service provider needs this for
authentication.
„ Maximum Channels: This will limit the maximum channels for this Trunk. For example,
you set 2 into this field; only 2 outgoing calls could go via this Trunk. Default is no limit.
„ Outbound Caller ID: Some service provider will require the correct registered caller ID
if it got an incoming call. Default the ePBX-100A-128 will send the Extension’s caller ID
to this Trunk, if you set empty here.