Welltech SIPPBX 6200A - Manual (Page 27)

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RTP Port End Enter the RTP Port End. The voice media will use RTP as the
transport protocol. You can define the RTP port range that
SIPPBX 6200A opened. Default end port is 20000.
Note: Default RTP port range is 10000 to 20000 and default
proxy port is 5060. If your SIPPBX 6200A is behind a firewall,
please make sure you have already opened the RTP port
(10000-20000) and proxy port (5060). And you should also
make sure the proxy port (5060) has already mapped to
SIPPBX 6200A.
Max Expire Time This sets the maximum amount of time, in seconds. This is
used for the registration expiry time. If this value is less than
the expiry time from the client, and then click the SIPPBX
6200A will reply a certain expiry time which is defined in
“Default Expire Time” to client.
Default Expire Time This sets the default SIP registration expiry time, in seconds. A
client will normally define this value when it initially registers,
so the default value you set here will be used only if the client
does not specify a timeout when it registers. If you are
registering to another SIP Trunk, this is the registration timeout
that it will send to the far end.
Codec Priority
Codec Priority Codec negotiation is attempted in the order in which the voice
Codec Priority is defined. Default is G.729 with the first priority,
G.711u with second priority, G.711A with third priority and
GSM is fourth priority. That means the SIPPBX 6200A can only
recognize these four Codecs and it will force the voice Codec
with the specified priority and forward to another subscriber.
Now, SIPPBX 6200A can support G.729, G.711U, G.711A, GSM
and G.723 Pass-Thru.
PBX Setting
Ext Ring Time This field defines the timeout value if the call is made between
Extension to Extension. Default is 20 seconds.
Out Ring Time This field defines the timeout value if the call is made from
Extension to outside Line (defined by routing table). Default is
no limitation timeout.
Music RBT If this call was made between extensions. Enabling this option
will provide music to the calling party as Ring Back Tone until
the call was answered.
Music RBT (After AA) If this call was forwarded from Auto Attendant. Enabling this