D-Link DI-1750 Reference Manual page 462

D-LinkIP telephone equipment provides IP Precedence and RSVP. Each voice packet will be marked
corresponding identifier.
Please see the correlative documents for complete information of QoS signalling.
12.3 About DSP sensing switch signalling tone
12.3.1 Sense
Command sense cptone port slot_num/port_num dial dial_string tone_type freq_type
slot_num/port_num is the port number to be sensed of signaling tone. dial_string is the number to be
dialed for sensing some signaling tone. tone_type is the type of signaling tone to be sensed. There's 8
types of them, they are respectively called DIALTONE_PBX，DIALTONE_EXT，LERTTONE_PBX，
ALERTTONE_EXT ， BUSYTONE_PBX ， BUSYTONE_EXT ， EMPTYTONE_PBX
EMPTYTONE_EXT. Each two of them forms a team and respectively express "dialing tone", "echo
tone", "busy tone" and "idle tone" in turn. PBX indicates the PBX signaling tone directly connected dwith
this PBX. EXT indicates the PBX signaling tone not directly connected with this PBX. Thereinto 4 types
of PBX signaling tone are necessary configuration (National standard supports default values). The
other 4 types are optional and can be configured up to 12, they are mostly used to configure "busy
tone". freq_type is type of frequency and is divided into single frequency and dual frequency. Please
refer to PBX specification for detail.
The first signaling tone has 4 sets of arguments: high_freq （high frequency， 2001 is invalid value， used
in single frequency.） 、 low_freq （low frequency） ， time_on （duration of wave crest） 、 time_off （ duration
of trough）.
Then we will take the sensing of the four PBX signaling tone for an example to make a detailed
description.
1. Dialing tone
When sensing the dialing tone （tone_type is DIALTONE_PBX or DIALTONE_EXT） ， dial_string can be
set an arbitrary numeral string, but it won't take any effect. time_on of the dialing tone is 300, time_off
is 1023 (invalid value).
2. Echo tone
When sensing echo tone （tone_type is ALERTTONE_PBX or ALERTTONE_EXT） ， dial_string must be
a phone number of another port on the PBX connected with this DSP and it must not be occupied.
Namely it has dialed through the corresponding number of current dial_string.
3. Busy tone
When sensing busy tone （tone_type 为 BUSYTONE_PBX or BUSYTONE_EXT） ， you should first hang
up another phone (number is dial_string) on the PBX connected with DSP port. Then you can process
sensing with this command.
4. Idle tone
When sensing idle tone （tone_type is EMPTYTONE_PBX or EMPTYTONE_EXT），you should
configure dial_string to be a phone number not existing on the PBX connected with this DSP port, and
then use this command to process sensing. Some switch has no idle tone, then you can use busy tone
instead of it and the result of sensing is consistent with busy tone. Here the idle tone of this PBX can be
set and can be not.
When sensing EXT signaling tone, you can apply the similar method.
12.3.2 Configure
It will enter into cptone configuration mode as configuring signaling tone (use command cptone
slot_num). The four signaling tone of PBX must be configured, otherwise it will take the default value.
Dialing tone (DIALTONE_PBX or DIALTONE_EXT) is required to be configured only two parameters,
Model Name
- 460 -
and