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 d ial tone. However, depend ing on far-end
administration, you may still be ab le to dial digi ts. All digits dialed after the
port number are transmitted us ing end-to-end DTMF signaling . If the trunk
being tested is a rotary trunk, it is not possible to break d ial tone.
DSO Loop-Around Test Call
The DS0 Loop Around feature provides a loop a round connection for inc oming
Non-ISDN DS1 trunk data calls. This feature is similar to the far end loop around
connection provid ed for the ISDN Test Call feature. This DS0 loop around is
provided prim arily to allow a network service provid er to perform facility testing at
the DS0 level before video teleconferenc ing terminals are installed at the PBX.
The feature is activated on a call-b y-call basis by dialing a test call ex tension
specified on the sec ond page of the System Parameters Maintenanc e form. No
special hardware is requi red. When the test call extension is received by the
PBX, a non inverting 64 kbps co nnection 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 netw ork using the ACCUNET Switched Digital
Service (SDS) or Software Defined Data Network (SDDN), the data transmission
rate is 56 Kbps since rob bed bit sig naling is used. For calls estab lished over a
private network using commo n channel signaling, the ful l 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 channe l signaling, the Communic ations 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 po rt
network from your station, and inter-PN
resources are not available to ac cess it.
Intercept Tone The port addressed is not a trunk, or it i s a
DID trunk, or the trunk is not administered.
Confirmation Tone The port is a tone receiver. See the ‘‘DTMR
Test Call’’ section.