> Close. Normally, at least in Qwest-land, third-party VM provider systems
dial
> into the switch and give it a DN and a MWI on-or-off command. If the DN
is
> serviced by that switch, it turns the message waiting indicator (stutter
> dialtone, MW light or both) on or off. If the number is on a remote
switch, the
> information gets sent over the SS7 network to the other Qwest switch. I
haven't
> seen MWI specifically mentioned as standard message sent via SS7, but
obviously
> it's being done. I don't know enough about the details of SS7 to know
what
> messages can be sent or if there's a generic container message that can be
used
> for anything.
---> Some international implementations do this in more easy, but more
faulty... when the switchs make a call diversion for a VoiceMail system, its
starts to make a stutter tone, or send MWI indications to the phone. If the
subscriber dials to VoiceMailMain application to retrieve the messages, the
switch stops the stutter tone, or anything. I know, is a crap, but in some
coutries it was implemented in this way.
> From my research that's correct. The PRI's D channel doesn't speak SS7,
> although the protocols are extremely similar in function. Everything I've
read
> says that getting out-of-band signalling to the CP was the whole point in
> creating ISDN. What I'm trying to find out is if there's some way to send
a D
> channel message that would get translated directly into SS7. The ISUP
layer of
> the SS7 protocol is the ISDN User Part - is that designed to encapsulate
CLASS
> messages?
----> No, you don't "directly" send information between PRI and ISUP
message... To understand correctly this, I send a complete ISUP trace.
>
> Take ANI for example. Your PRI sends the ANI information to the near end
switch
> over the D channel which then passes it on (without verification, I might
add)
> on to the destination switch via SS7. This is a case where the
information is
> transferred directly. What about LIDB lookups or route information? Is
there
> any way to get this, which is definitely available over SS7, from the D
channel?
----> This is not 100% accured... In all implementations that I saw, you can
send any ANI to PSTN switch in PRI, but this switch makes a check to
determine if your ANI is valid, and if your ANI is your real ANI!!! This is
the most important check.
> > So, the proper answer is that if you really want to implement this PRI -
SS7
> > - PRI message, you should really be talking to your nearest CO Engineer
or
> > Telco Enterprise Business Office where they handle this all the time for
> > enterprise call center applications.
----> Mhh... is really hard...
> > On the other hand, maybe Gus could contribute a regular tutorial on how
he's
> > got various things interconnected. The more the info, the better. Gus
once
> > asked if we want the plethora of info he can provide. I vote yes.
----> Sure! I have some documents very useful. Please give me some ideas to
know what things you like.
Regards,
Gus
+---------+---------------------------------------------+------------------------------------+
|BITMASK |ID Name |Comment or Value
|
+---------+---------------------------------------------+------------------------------------+
|10/28 08:36:03,589 1:B (Rx):16 MSU IAM 8971 16289 25 `54441111f` `6751010866`
|
|MTP Level 2 (MTP-L2) MSU (= Message Signal Unit)
|
|Message Signal Unit
|
|-0101101 |Backward Sequence Number |45
|
|1------- |Backward Indicator Bit |1
|
|-0110100 |Forward Sequence Number |52
|
|0------- |Forward Indicator Bit |0
|
|--100110 |Length Indicator |38
|
|00------ |Spare |0
|
|----0101 |Service Indicator |ISDN User Part
|
|--00---- |Sub-Service: Priority |Spare/priority 0 (U.S.A.
only) |
|10------ |Sub-Service: Network Ind |National message
|
|**b14*** |Destination Point Code |16289
|
|**b14*** |Originating Point Code |8971
|
|CCITT BLUE BOOK ISDN User Part (ISUP) IAM (= Initial Address)
|
|Initial Address
|
|1001---- |Signalling Link Selection |9
|
|**b12*** |Circuit Ident Code |25
|
|0000---- |Spare |0
|
|00000001 |Message Type |1
|
|------00 |Satellite Indicator |No satellite circuit
|
|----00-- |Continuity Check Indicator |Cont Check not required
|
|---0---- |Echo Suppressor Indicator |O/G half echo supp not
included |
|000----- |Spare |0
|
|-------0 |Nat./Internat. Indicator |Treat as a national call
|
|-----00- |End-to-End Method Ind |No end-to-end method
available |
|----0--- |Interworking Indicator |No interworking encountered
|
|---0---- |End/End Information Ind |No end-to-end info available
|
|--1----- |ISDN User Part Indicator |ISDN-UP used all the way
|
|00------ |ISDN-UP Preference Ind |ISDN-UP preferred all the way
|
|-------0 |ISDN Access Indicator |Originating access non-ISDN
|
|-----00- |SCCP Method Indicator |No indication
|
|00000--- |Spare |0
|
|00001010 |Calling Party's Category |Ordinary calling subscriber
|
|00000011 |Transmission Medium Reqt |3.1 kHz audio
|
|00000010 |Pointer to parameter |2
|
|00001001 |Pointer to parameter |9
|
|Called party number
|
|00000111 |Parameter Length |7
|
|-0000001 |Nature of Address |Subscriber number
|
|1------- |Odd/Even Indicator |Odd number of address signals
|
|----0000 |Spare |0
|
|-001---- |Numbering Plan Indicator |ISDN Nr.plan (E.164/E.163)
|
|0------- |Internal Network No. Ind |Routing to INN allowed
|
|**b36*** |Called Address Signals |`54441111f`
|
|0000---- |Filler |0
|
|Calling party number
|
|00001010 |Parameter Name |Calling Party Number
|
|00000111 |Parameter Length |7
|
|-0000011 |Nature of Address |National (significant) number
|
|0------- |Odd/Even Indicator |Even number of address
signals |
|------01 |Screening Indicator |User provided, verified
passed |
|----00-- |Presentation Restr. Ind |Presentation allowed
|
|-001---- |Numbering Plan Indicator |ISDN Nr.plan (E.164/E.163)
|
|0------- |Callg No. Incomplete Ind |Complete
|
|***B5*** |Calling Address Signals |`6751010866`
|
|User service information
|
|00011101 |Parameter Name |User service information
|
|00000011 |Parameter Length |3
|
|---10000 |Info Transfer Capability |3.1 kHz audio
|
|-00----- |Coding Standard |CCITT-standardized coding
|
|1------- |Extension Indicator 1 |Last octet
|
|---10000 |Information Transfer Rate |64 kbit/s
|
|-00----- |Transfer Mode |Circuit mode
|
|1------- |Extension Indicator 2 |Last octet
|
|---00011 |User Info Layer 1 Protcol |G.711 A-law
|
|-01----- |Layer Identification |User info layer 1 protocol
|
|1------- |Extension Indicator 3 |Last octet
|
|End of optional parameters
|
|00000000 |End of Optional Params |0
|
+---------+---------------------------------------------+------------------------------------+
|BITMASK |ID Name |Comment or Value
|
+---------+---------------------------------------------+------------------------------------+
|10/28 08:36:08,363 1:A (Rx):16 MSU ACM 16289 8971 25
|
|MTP Level 2 (MTP-L2) MSU (= Message Signal Unit)
|
|Message Signal Unit
|
|-0111110 |Backward Sequence Number |62
|
|0------- |Backward Indicator Bit |0
|
|-0111101 |Forward Sequence Number |61
|
|1------- |Forward Indicator Bit |1
|
|--001011 |Length Indicator |11
|
|00------ |Spare |0
|
|----0101 |Service Indicator |ISDN User Part
|
|--00---- |Sub-Service: Priority |Spare/priority 0 (U.S.A.
only) |
|10------ |Sub-Service: Network Ind |National message
|
|**b14*** |Destination Point Code |8971
|
|**b14*** |Originating Point Code |16289
|
|CCITT BLUE BOOK ISDN User Part (ISUP) ACM (= Address Complete)
|
|Address Complete
|
|1001---- |Signalling Link Selection |9
|
|**b12*** |Circuit Ident Code |25
|
|0000---- |Spare |0
|
|00000110 |Message Type |6
|
|------10 |Charge Indicator |Charge
|
|----01-- |Called Party's Status Ind |Subscriber free
|
|--00---- |Called Party's Category |No indication
|
|00------ |End-to-End Method Ind |No end-to-end method
available |
|-------1 |Interworking Indicator |Interworking encountered
|
|------0- |End/End Information Ind |No end-to-end info available
|
|-----0-- |ISDN User Part Indicator |ISDN-UP not used all the way
|
|----0--- |Holding Indicator |Holding not requested
|
|---0---- |ISDN Access Indicator |Terminating access non-ISDN
|
|--0----- |Echo Control Device Ind |I/C half echo supp not
included |
|00------ |SCCP Method Indicator |No indication
|
|00000000 |Pointer to parameter |0
|
+---------+---------------------------------------------+------------------------------------+
|BITMASK |ID Name |Comment or Value
|
+---------+---------------------------------------------+------------------------------------+
|10/28 08:36:09,815 1:A (Rx):16 MSU ANM 16289 8971 25
|
|MTP Level 2 (MTP-L2) MSU (= Message Signal Unit)
|
|Message Signal Unit
|
|-0111111 |Backward Sequence Number |63
|
|0------- |Backward Indicator Bit |0
|
|-1000001 |Forward Sequence Number |65
|
|1------- |Forward Indicator Bit |1
|
|--001001 |Length Indicator |9
|
|00------ |Spare |0
|
|----0101 |Service Indicator |ISDN User Part
|
|--00---- |Sub-Service: Priority |Spare/priority 0 (U.S.A.
only) |
|10------ |Sub-Service: Network Ind |National message
|
|**b14*** |Destination Point Code |8971
|
|**b14*** |Originating Point Code |16289
|
|CCITT BLUE BOOK ISDN User Part (ISUP) ANM (= Answer Message)
|
|Answer Message
|
|1001---- |Signalling Link Selection |9
|
|**b12*** |Circuit Ident Code |25
|
|0000---- |Spare |0
|
|00001001 |Message Type |9
|
|00000000 |Pointer to parameter |0
|
+---------+---------------------------------------------+------------------------------------+
|BITMASK |ID Name |Comment or Value
|
+---------+---------------------------------------------+------------------------------------+
|10/28 08:36:40,768 1:B (Rx):16 MSU REL 8971 16289 25 Normal call clearing
|
|MTP Level 2 (MTP-L2) MSU (= Message Signal Unit)
|
|Message Signal Unit
|
|-1010100 |Backward Sequence Number |84
|
|1------- |Backward Indicator Bit |1
|
|-0101101 |Forward Sequence Number |45
|
|0------- |Forward Indicator Bit |0
|
|--001101 |Length Indicator |13
|
|00------ |Spare |0
|
|----0101 |Service Indicator |ISDN User Part
|
|--00---- |Sub-Service: Priority |Spare/priority 0 (U.S.A.
only) |
|10------ |Sub-Service: Network Ind |National message
|
|**b14*** |Destination Point Code |16289
|
|**b14*** |Originating Point Code |8971
|
|CCITT BLUE BOOK ISDN User Part (ISUP) REL (= Release)
|
|Release
|
|1001---- |Signalling Link Selection |9
|
|**b12*** |Circuit Ident Code |25
|
|0000---- |Spare |0
|
|00001100 |Message Type |12
|
|00000010 |Pointer to parameter |2
|
|00000000 |Pointer to parameter |0
|
|Cause indicators
|
|00000010 |Parameter Length |2
|
|----0010 |Location |Public net serving local user
|
|---0---- |Spare |0
|
|-00----- |Coding Standard |CCITT standard
|
|1------- |Extension Indicator 1 |Last octet
|
|-0010000 |Cause Value |Normal call clearing
|
|1------- |Extension Indicator 2 |Last octet
|
+---------+---------------------------------------------+------------------------------------+
|BITMASK |ID Name |Comment or Value
|
+---------+---------------------------------------------+------------------------------------+
|10/28 08:36:40,819 1:A (Rx):16 MSU RLC 16289 8971 25
|
|MTP Level 2 (MTP-L2) MSU (= Message Signal Unit)
|
|Message Signal Unit
|
|-0101101 |Backward Sequence Number |45
|
|0------- |Backward Indicator Bit |0
|
|-1010110 |Forward Sequence Number |86
|
|1------- |Forward Indicator Bit |1
|
|--001001 |Length Indicator |9
|
|00------ |Spare |0
|
|----0101 |Service Indicator |ISDN User Part
|
|--00---- |Sub-Service: Priority |Spare/priority 0 (U.S.A.
only) |
|10------ |Sub-Service: Network Ind |National message
|
|**b14*** |Destination Point Code |8971
|
|**b14*** |Originating Point Code |16289
|
|CCITT BLUE BOOK ISDN User Part (ISUP) RLC (= Release Complete)
|
|Release Complete
|
|1001---- |Signalling Link Selection |9
|
|**b12*** |Circuit Ident Code |25
|
|0000---- |Spare |0
|
|00010000 |Message Type |16
|
|00000000 |Pointer to parameter |0
|
