Telecommunications - configuration call barring

 

Subscription Option - Incoming Calls Barred

Subscription Option - Outgoing Calls Barred


This covers the following CCITT subscriptions:

Incoming Calls Barred

This facility, if subscribed to, prevents incoming calls from being presented to the DTE.

Outgoing Calls Barred

This facility, if subscribed to, prevents the network from accepting outgoing calls from the DTE.


If subscribed to, these facilities apply regardless of what logical channel group numbers are subscribed to.

These facilities is not normally supported on UK since the same effect can be achieved by providing outgoing logical channels only (LCGN 6).

X.2 LEVEL 3 PER USER SUBSCRIPTION X.2 (1984) UK(a) UK(b) interworking
OPTIONS REF CLASS now now R5a R5b R6
Incoming calls barred............... 1.8 E T p
Outgoing calls barred............... 1.9 E T p

| Incoming calls barred...............| 1.8 E | T | | |

|

|

| | # | Outgoing calls barred...............| 1.9 E | T | | |

|

|

| | #


_UKa  Answers_

Question: If incoming calls are barred (Q156=YES). Will that X.25 line be able to make calls back to itself.

Answer : No

_UKb support_

v  4.03  - yes indirectly, requires the setting of  a  number  of configuration parameters to effectively provide facility.

Question: If outgoing calls are barred (Q159=YES). Will that X.25 

line be able to make calls back to itself.

Answer : No

.ei

.if &UKb& = y

_UKb support_

v  4.03  - yes indirectly, requires the setting of  a  number  of configuration parameters to effectively provide facility.

SVC:

PVC:

not applicable to ONA

_Test plan and implementation issues_

Although already supported on Public Network, it is not currently offered to users since the same thing can be done by subscribing to incoming logical channels only.


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