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because the H.245 channel negotiations
can proceed in parallel to H.225.
fast_start
Valid values: <true>, <false>
Default: false
Description: Fast start sends encoded
OpenLogicalChannel messages within the
Setup messages and hence eliminates
the need for a separate H.245 channel
for Codec capability negotiation. This
will only work if the other party is also
supporting fast start. This feature in H.323
is optional, meaning it can be ignored by
an endpoint not supporting this feature,
hence making the snom phone revert to
the normal H.245 signalling on a separate
channel. Note that if Fast Start is being
used, Out of band DTMF might not work
because the DTMF info is relayed on the
H.245 channel.
h323_h245_tunneling
Valid values: <true>, <false>
Default: false
Description:
sends tunnelled H.245 messages within
an H.225 pdu. This also accelerates
connection setup if both parties are
supporting this feature.
trace
Valid values: <true>, <false>
Default: true
Description: Enable tracing output of the
current protocol stack.
h323_h450
Valid values: <true>, <false>
Default: false
Description: If fl ag is set to <true>,
H.450 supplementary services are used,
otherwise (<false>) it is facility-based.
snom phones confi guration
[ F
R E Q U E N T L Y
H.245
Tunnelling
A
Q
S K E D
U E S T I O N
Gateway prefi xes (H.323 only)
external_line_prefi x
Valid values: e.g. <0>, <111>
Default: blank
Description: Prefi x used for reaching
outside numbers via an H323 gateway.
This prefi x will be replaced by the
gateway_prefi x in a dialled number for
calling outside numbers (see gateway_
prefi x).
gateway_prefi x
Valid values: e.g. <*5>
Default: blank
Description: Prefi x with which an ISDN
gateway is registered at the gatekeeper.
The phone will replace this prefi x with the
external_line_prefi x in a dialled number if
it is starting with the external_line_prefi x
(see external_line_prefi x).
Hence the user doesn't have to dial
numbers like 5*1234567 but can instead
dial 01234567 with the same effect.
option
PBX key codes (H.323 only)
key_seq_hold_on
Valid values: For example <*1>
Default: blank
Description: Key code that is sent by the
phone to the PBX if it is set and the "R"
(hold on) key is pressed on the phone.
key_seq_hold_off
Valid values: For example <*2>
Default: blank
Description: Key code that is sent by the
phone to the PBX if it is set and the "R"
(hold off) key is pressed on the phone.
key_seq_transfer_blind
Valid values: e.g. <*60#>
Default: blank
Description: Key code that is sent by the
]
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