Version 7.2 457 Mediant 1000B Gateway & E-SBC
User's Manual 21. Digital PSTN
TelProfile_IsFaxUsed, TelProfile_JitterBufMinDelay,
TelProfile_JitterBufOptFactor, TelProfile_IPDiffServ,
TelProfile_SigIPDiffServ, TelProfile_DtmfVolume,
TelProfile_InputGain, TelProfile_VoiceVolume,
TelProfile_EnableReversePolarity,
TelProfile_EnableCurrentDisconnect,
TelProfile_EnableDigitDelivery, TelProfile_EnableEC,
TelProfile_MWIAnalog, TelProfile_MWIDisplay,
TelProfile_FlashHookPeriod, TelProfile_EnableEarlyMedia,
TelProfile_ProgressIndicator2IP;
TelProfile_1 = voice,$$,1,$$,$$,$$,$$,$$,$$,$$
TelProfile_2 = data,$$,2,$$,$$,$$,$$,$$,$$,$$
[\TelProfile]
21.5.1.1 DSP Pattern Detector
For TDM tunneling applications, you can use the DSP pattern detector feature to initiate
the echo canceller at call start. The device can be configured to support detection of a
specific one-byte idle data pattern transmitted over digital E1/T1 timeslots. The device can
be configured to detect up to four different one-byte data patterns. When the defined idle
data pattern is detected, the channel resets its echo canceller.
 To configure DSP pattern detector:
1. In the DSP Settings page (Setup menu > Signaling & Media tab > Media folder >
DSP Settings), do the following:
a. From the 'IPMedia Detectors' drop-down list (EnableDSPIPMDetectors), select
Enable.
b. From the 'Enable Pattern Detector' drop-down list (EnablePatternDetector), select
Enable.
2. Configure the number (e.g., 5) of consecutive patterns to trigger the pattern detection
event, using the ini file parameter, PDThreshold.
3. Configure the patterns that can be detected by the Pattern Detector, using the ini file
parameter, PDPattern. For example:
PDPattern = 84, 85, 212, 213 ; for idle patterns 54, 55, D4
and D5
21.5.2 QSIG Tunneling
The device supports QSIG tunneling over SIP, according to IETF Internet-Draft draft-elwell-
sipping-qsig-tunnel-03 ("Tunnelling of QSIG over SIP") and ECMA-355/ISO/IEC 22535.
This is applicable to all ISDN variants. QSIG tunneling can be applied to all calls or to
specific calls using IP Profiles.
Note: TDM tunneling is applicable to PRI and BRI.
QSIG tunneling sends all QSIG messages as raw data in corresponding SIP messages
using a dedicated message body. This is used, for example, to enable two QSIG
subscribers connected to the same or different QSIG PBX to communicate with each other
over an IP network. Tunneling is supported in both directions (Tel-to-IP and IP-to-Tel).
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