Telecommunications - Configuration of X.25 Reverse Charging

 

Subscription Option - Reverse Charging Acceptance

Subscription Option - Local charging prevention

This facility, if subscribed to, authorises the network to transmit to the DTE incoming calls which request the reverse charge facility.

Normally calls are paid for by the calling party, reverse charge ensures that the called party pays for the call, if the called DTE accepts the call.

X.2 LEVEL 3 PER USER SUBSCRIPTION X.2 (1984) UK(a) UK(b) interworking
OPTIONS REF CLASS now now R5a R5b R6
Reverse charge acceptance........... 1.19 A . . . .

| Reverse charge acceptance...........| 1.19 A |

| . | . | . | . | | #

UK(a) = supported

UK(b) = supported, although may not be supported at launch due to upgrade required on billing program.


UK(b) - Although UKb already have facilities to negotiate reverse charge, the billing programs ignores this information. Therefore UKb effectively do not support reverse charge. There is an enhancement at LOG II to pass reverse charge information to the SUP when a call setup is requested. I don't think this is required for reverse charge billing, but we need to check this.


Already supported - no change at release 4.

UKa Answers

Question: Is fast select supported with reverse charge? if the call is cleared who pays for the call?

Answer : Yes it is, the remote end will pay for the call.

table build question:

TNDTED Q158(was q42 ) accept incoming collect calls (YES/NO)

|TNDTED Q158| q42 | accept incoming collect calls.......#default=NO

TNDTED Q161(was q45 ) originate (YES/NO)

|TNDTED Q161| q45 | originate collect calls.............#default=NO

causes DTE to originate reverse charge by DEFAULT.

&UKb& = yUKb support

v 4.03

RD 0004 part 8:1.C (PICS proforma Public Network1984)

FS6b - Reverse Charging - send...... O = Optional

FR6b - Reverse Charging - receive .. O = Optional

Therefore release 4 is compatible with ONA for this option.



Subscription Option - Local charging prevention

\info\computer\UK\x25-sub\sub-lcp.t1

&UKa& = yUKa support

DX1: no

DX2: yes

TP4/III: ?

This is a new facility for release 4.

table build questions:

TNDTED Q131(was Q124) subscribe: local charge prevention

|TNDTED Q131| Q124 | subscribe: local charge prevention.#(YES/NO)

default NO

standard Public Network settings = NO

if YES then the DTE must:

place reverse charge calls, or, Include the UKa ID facility (Q208/Q209), or,

Divert calls to TAMS for validation

UKa Answers

Question: Does the NUI facility require the use of TAMS?

Answer : No.

&UKb& = yUKb support

v 4.03

SVC: yes

PVC: n/a

not covered by ONA

Test plan and implementation issues

Charging prevention could be a way to provide an X.25/X.32 service, ie avoid the need for complex NUI validation by making the other end pay.

\info\computer\UK\x25-sub\lcp-t.t1

&UKa& = yUKa support

DX1: no

DX2: yes

TP4/III: ?

This is a new facility for release 4.

table build questions:

TNDTED Q131(was Q124) subscribe: local charge prevention

|TNDTED Q131| Q124 | subscribe: local charge prevention.#(YES/NO)

default NO

standard Public Network settings = NO

if YES then the DTE must:

place reverse charge calls, or, Include the UKa ID facility (Q208/Q209), or,

Divert calls to TAMS for validation

UKa Answers

Question: Does the NUI facility require the use of TAMS?

Answer : No.

&UKb& = yUKb support

v 4.03


Test plan and implementation issues

Charging prevention could be a way to provide an X.25/X.32 service, ie avoid the need for complex NUI validation by making the other end pay.


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