DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Additional Maintenance Procedures
6-24Facility test calls
6
3. Listen for one of the following tones:
4. Place a call. If the call does not go through (no ringing is heard) check to
see if the circuit has been removed or if the trunk is a rotary trunk.
The dial tone heard is coming from the far-end. If the far end has been
disabled, you will not hear dial tone. However, depending on far-end
administration, you may still be able to dial digits. All digits dialed after the
port number are transmitted using end-to-end DTMF signaling. If the trunk
being tested is a rotary trunk, it is not possible to break dial tone.
DSO Loop-Around Test Call
The DS0 Loop Around feature provides a loop around connection for incoming
Non-ISDN DS1 trunk data calls. This feature is similar to the far end loop around
connection provided for the ISDN Test Call feature. This DS0 loop around is
provided primarily to allow a network service provider to perform facility testing at
the DS0 level before video teleconferencing terminals are installed at the PBX.
The feature is activated on a call-by-call basis by dialing a test call extension
specified on the second page of the System Parameters Maintenance form. No
special hardware is required. When the test call extension is received by the
PBX, a non inverting 64 kbps connection is set up on the PBX’s Time Division
Multiplexed bus. More than one loop around call can be active at the same time.
For calls routed over the public network using the ACCUNET Switched Digital
Service (SDS) or Software Defined Data Network (SDDN), the data transmission
rate is 56 Kbps since robbed bit signaling is used. For calls established over a
private network using common channel signaling, the full 64 kbps data rate is
available.
When the incoming trunk group is used only for data calls (SDS), the
Communications Type on the associated Trunk Group form should be set to
“data”. When the incoming trunk group is used for robbed bit alternate voice
and/or data (SDN/SDDN), the Communications Type on the Trunk Group form
should be set to “rbavd” (robbed bit alternate voice data). For private network
trunks using common channel signaling, the Communications Type on the
associated Trunk Group form can be set to “avd”.
Dial tone or Silence The trunk is connected. Go to step 4.
Busy Tone The trunk is either busy processing a call or
is out of service. Check
status trunk
.
Reorder tone The trunk requested is in a different port
network from your station, and inter-PN
resources are not available to access it.
Intercept Tone The port addressed is not a trunk, or it is a
DID trunk, or the trunk is not administered.
Confirmation Tone The port is a tone receiver. See the ‘‘DTMR
Test Call’’ section.
