Display IE
The affectation IE sends argument to do such things as accommodate achievement for an LCD display. This IE
is frequently acclimated to canyon addition name advice over a PRI, although PBXs and
telecommunications account providers with NI3-type ISDN switches abide that alone pass
calling name advice with the ability IE in QSIG. The affectation and ability IEs are
used by Cisco Unified Communications Manager (UCM) to abutment addition name and
number identification presentation. These casework are based on the accessory ascendancy protocols
that handle the call. Not all accessory protocols accommodate addition cardinal and name information
in the agreement messages.
Table 4-8 capacity accepted advice elements.
Table 4-8 Accepted IEs
Value Name Description
0x04 Bearer Specifies packet or ambit mode, abstracts rate, and blazon of information
content (voice).
0x08 Cause Provides the acumen a alarm was alone or disconnected. Following is a
sample of accessible causes:
0x01 Unassigned number
0x03 No avenue to destination
0x06 Approach unacceptable
0x10 Normal alarm clearing
0x11 User busy
0x12 User not responding
0x13 User alerting; no answer
0x1B Destination out of order
0x1C Invalid cardinal format
0x22 No ambit or approach available
0x2A Switching accessories congestion
0x14 Alarm Accompaniment Current cachet of a alarm in agreement of the accepted Q.931 accompaniment machine.
0x18 CID Defines the B approach actuality used.
Table 4-8 Common IEs (continued)
Value Name Description
0x1C Facility Indicates the invocation and operation of supplemental services, identified
by the corresponding operation value within the facility IE.
Following are some examples of supplemental services:
Called or calling party identification
Sub addressing
Hold or retrieve
Call transfer
Message waiting
0x1E Progress Provides information about the call in progress. Following are some
Indication examples of progress indication:
0x01 Call is not end-to-end ISDN.
0x02 Destination address is non-ISDN.
0x03 Origination address is non-ISDN.
0x04 Call has returned to the ISDN.
0x08 In-band information or the appropriate pattern is now available.
0x0A Delay in response at the destination interface.
0x28 Display Provides human-readable text that can be specified with almost any
message (for example, to provide text for an LCD display).
0x2C Keypad Dialed digits.
0x34 Signal Provides call status tones according to the following chart:
0x00 Dial tone 350 Hz + 440 Hz; continuous
0x01 Ringing 440 Hz + 480 Hz; 2 sec on/4 sec off
0x02 Intercept Alternating 440 Hz and 620 Hz; 250 ms
0x03 Network congestion 480 Hz + 620 Hz; 250 ms on/250 ms off
(fast busy)
0x04 Busy 480 Hz + 620 Hz; 500 ms on/500 ms off
0x05 Confirm 350 Hz + 440 Hz; repeated three times:
100 ms on/100 ms off
0x06 Answer Not used
0x07 Call waiting 440 Hz; 300 ms burst
0x08 Off-hook 1400 Hz + 2060 Hz + 2450 Hz + 2600 Hz;
warning 100 ms on/100 ms off
0x3F Tones Off
Table 4-8 Common IEs (continued)
Value Name Description
0x3A SPID Contains a service profile identifier (SPID).
0x4C Connected Indicates the remaining caller if a disconnect occurs during
Number CONFERENCE.
0x6C Calling Party Origin phone number.
Number
0x70 Called Party Phone number being dialed.
Number
0x7C LLC Lower layer compatibility.
0x7D HLC Higher layer compatibility.
0x7E User-User User-user information.
The debug isdn q931 command can be used to view detailed Layer 3 signaling information
(that is, Q.931 information). Example 4-1 provides sample output from a debug isdn
q931 command.