QSIG

B Private Networking

 

Tandem switch information

 

However, in the case of tandemed calls (calls involving two ISDN trunks that are not

 

both administered for Supplementary Service Protocol B), trunk group administration

 

may override both incoming name and number information, as long as doing so does

 

not lower the restriction on the information. For example, a tandemed call that comes

 

in with restricted name information is sent out with restricted name information even

 

if the outgoing trunk is administered for presentation unrestricted. However,

 

non-restricted data is sent restricted if the trunk group administration is set for

 

“presentation restricted.”

 

ISDN numbering formats

 

Numbering is specified on the ISDN Public-Unknown-Numbering and/or ISDN

 

Private-Numbering forms. The numbering form you use depends on how you

 

administer the ISDN trunk group Numbering Format field.

 

However, if you format the Called Party Number with public numbering, the

 

Calling/Connected Party Number is created in the public format even if you specify

 

“private” on the ISDN trunk group form. This provides the caller or called party a

 

number that can be used to reach the other party. Since the call routes through the

 

public network, the public Calling/Connected Party Number is a more accurate

 

address.

Call Forwarding

Call Forwarding works over a QSIG network.

(Diversion)

When a call has already been forwarded 3 times over a QSIG trunk, it is not

 

 

forwarded again but instead terminates at the final forwarded-to terminal. Remote

 

activation and deactivation of this feature are not supported.

Call Transfer

QSIG Call Transfer is based on the current DEFINITY ECS Transfer and

 

Trunk-to-Trunk Transfer features. QSIG Transfer signaling occurs as long as one of

 

the calls involves a QSIG trunk between the two switches.

 

Once a call is transferred, the transferring switch is unnecessary. Additional Network

 

Feature-Path Replacement (ANF-PR) is invoked automatically to connect the

 

transferred call more efficiently in the private network. QSIG Call Transfer attempts

 

to connect the two parties more efficiently and drops the unnecessary switches.

 

When you use this feature, you see no difference between QSIG Call Transfer and the

 

standard DEFINITY ECS Transfer or Trunk-to-Trunk Transfer features.

 

QSIG Call Transfer differs from DCS Call Transfer in that additional call information

 

is available for the connected parties after the transfer completes.

 

Depending upon QSIG Identification Services administration, the connected parties’

 

displays show each other’s name and/or number. If the name and number are not

 

available, the display of a connected party updates with the name of the involved

 

trunk group.

 

 

Administration for Network Connectivity

362

CID: 77730

555-233-504 — Issue 1 — April 2000

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Lucent Technologies Release 8.2 manual Tandem switch information, Isdn numbering formats, Diversion, Call Transfer