rfc3064.txt

最新的RFC

           Table 4 FXO analog PBX Trunks

         --------------------------------------
        | Trunk Type    |  Direction           |
        |               | (w.r.t. the gateway) |
         --------------------------------------
        |FXO, loop-start|Bi-directional        |
        |FXO, ground-   |Bi-directional        |
        |     start     |                      |
         --------------------------------------

1.2.5. "MD" Package

   The MD package provides support for North American MF Feature Group D
   EANA and EAIN [3], allowing the Media Gateway to be at either the end
   office, the carrier or the tandem side of the circuit.  The CAS
   Signaling Type column of the following tables is intended to indicate
   signaling differences that are of common interest to both the Call
   Agent and Media Gateway.  Configuration information that is only of
   interest to the Media Gateway is not identified.







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           Table 4 Feature Group D MF Trunks Supported

        --------------------------------------------------
       |  Trunk Type    |  Direction (w.r.t. the gateway) |
        --------------------------------------------------
       |FGD, EANA       |Outgoing (End Office to Carrier) |
       |FGD, EANA       |Incoming (Carrier to End Office) |
       |FGD, EAIN       |Outgoing (End Office to Carrier) |
       |FGD, EAIN       |Incoming (Carrier to End Office) |
        --------------------------------------------------

   Note that EANA and EAIN signaling may be requested on the same trunk
   on a call-by-call basis.

1.2.6. "MO" Package

   The "MO" package is used for FGD Operator Services Signaling,
   outgoing trunks only.  Feature Group C can also be supported by the
   same interface.

2.0. Event Packages

   This section defines the event packages.  The terms "signal" and
   "event" are used to differentiate a command from a Call Agent to a
   Media Gateway ("signal") from an "event" that  is detected by the
   Media Gateway and then is "Notified" to the Call Agent.

   Each package definition includes a package name, plus the event name
   codes and the definitions for each of the events in the package.  In
   the tables of events/signals for each package, there are five
   columns:

      * Code         The package unique event code used for the
                     event/signal.

      * Description  A short description of the event/signal.

      * Event        An "x" appears in this column if the event can be
                     Requested by the Call Agent.  Alternatively, one or
                     more of the following symbols may appear:

        - "P" indicating that the event is persistent,

        - "S" indicating that the event is an event-state that may be
              audited,






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        - "C" indicating that the event/signal may be detected/applied
              on a connection.  If "C" is associated with an event, this
              refers to an event that can occur on the media stream.
              However, "C" may also be associated with a signal (in the
              signal column), the signal can be requested to sent over a
              connection.

   Note that the intent of being able to audit state ("S") in an event
   in the following packages is to answer one of the two questions:

      1. Has a call been initiated on this line/trunk? For example in
      the packages that follow, call setup initiation is indicated by
      either a "sup" event or an "hd" (FXS - "BL" packages) or in the
      case of the "DO" package below (FXO), by the "rg" event so that
      those events have an "S" in the event column indicating that they
      are auditable.

      2. The other question of interest is to know whether the telephony
      leg of the call is in the idle state so that a new call can be
      initiated.  This is indicate by the "rlc" (release complete)
      event-state for packages that have that event.

       *  Signal     If nothing appears in this column then this event
                     cannot be signaled on request by the Call Agent.
                     Otherwise, one of the following symbols is provided
                     to identify the type of signal:

        - "OO" On/Off signal.  The signal is turned on until commanded
               by the Call Agent to turn it off, and vice versa.
        - "TO" Timeout signal.  The signal lasts for a given duration
               unless it is superseded by a new signal or terminated on
               detection of an event.  Default time-out values are
               supplied.  A value of zero indicates that the time-out
               period is infinite.  The provisioning process may alter
               these default values.
        - "BR" Brief signal.  The signal has a short, known duration.

       * Additional info Provides additional information about the
         event/signal, e.g., the default duration of TO signals.

   Unless otherwise stated, all of the events/signals are
   detected/applied on endpoints and audio generated by them is not
   forwarded on any connection the endpoint may have.  Audio generated
   by events/signals that are detected/applied on a connection will
   however be forwarded on the associated connection irrespective of the
   connection mode.





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2.1. Events and Signals for the "MS" package:

   The following codes are used to identify events and signals for the
   "MS" package:

      Table 5 "MS" Package Events and Signals
 ---------------------------------------------------------------------
|Code|Description       |Event|Signal |Additional Info                |
|---------------------------------------------------------------------|
|ans |Call Answer       |  P  |  BR   |                               |
| bl |Block             |  S  |  BR   |                               |
| bz |Busy tone         |  -  |  TO   |Time-out = 30 seconds          |
|inf |Information Digits|  x  |   -   |                               |
| oc |Operation Complete|  x  |   -   |                               |
| of |Operation Fail    |  x  |   -   |                               |
|rel |Release Call      |  P  |  BR   |                               |
|res |Resume call       |  P  |  BR   |                               |
|rlc |Release complete  | P,S |  BR   |                               |
| ro |Reorder tone      |  -  |  TO   |Time-out = 30 seconds          |
| rt |Ringback tone     |  -  |  TO   |Time-out = 180 seconds         |
|sup |Call Setup        | P,S |  TO   |Time-out when signal completes |
|    |                  |     |       |out-pulsing                    |
|sus |Suspend call      |  P  |  BR   |                               |
 ---------------------------------------------------------------------



























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2.2. Events and Signals for the "DT" package:

   The following codes are used to identify events and signals for the
   "DT" package:

     Table 6 "DT" Package Events and Signals
 ---------------------------------------------------------------------
|Code|Description       |Event|Signal |Additional Info                |
|---------------------------------------------------------------------|
|ans |Call Answer       |  P  |  BR   |                               |
| bl |Block             |  S  |  BR   |                               |
| bz |Busy tone         |  -  |  TO   |Time-out = 30 seconds          |
| dl |Dial tone         |  -  |  TO   |Time-out = 16 seconds          |
| oc |Operation Complete|  x  |  -    |                               |
| of |Operation Fail    |  x  |  -    |                               |
|rel |Release Call      |  P  |  BR   |                               |
|res |Resume call       |  P  |  BR   |                               |
|rlc |Release complete  | P,S |  BR   |                               |
| ro |Reorder tone      |  -  |  TO   |Time-out = 30 seconds          |
| rt |Ringback tone     |  -  |  TO   |Time-out = 180 seconds         |
|sup |Call Setup        | P,S |  TO   |Time-out when signals completed|
|    |                  |     |       |out-pulsing                    |
|sus |Suspend call      |  P  |  BR   |                               |
 ---------------------------------------------------------------------

2.3. Events and Signals for the "BL" package (Basic PBX)

   The following codes are used to identify events and signals for the
   "BL" package.  This package looks very much like a simplified line
   package:

          Table 7 "BL" Package Events and Signals
 ---------------------------------------------------------------------
|Code|Description       |Event|Signal |Additional Info                |
|---------------------------------------------------------------------|
| bz |Busy tone         |  -  |  TO   |Time-out = 30 seconds          |
| dl |Dial tone         |  -  |  TO   |Time-out = 16 seconds          |
| hd |Off-hook          | P,S |   -   |                               |
| hf |Flash hook        |  P  |   -   |                               |
| hu |On-hook           | P,S |   -   |                               |
| oc |Operation Complete|  x  |   -   |                               |
| of |Operation Fail    |  x  |   -   |                               |
| rel|Release           |  -  |  BR   |                               |
| rg |Ringing           |  -  |  TO   |Time-out = 180 seconds         |
| ro |Reorder tone      |  -  |  TO   |Time-out = 30 seconds          |
| rt |Ringback tone     |  -  | C,TO  |Time-out = 180 seconds         |
 ---------------------------------------------------------------------




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2.4. Events and Signals for the "DO" package:

   The following codes are used to identify events and signals for the
   "DO" package:

     Table 8 "DO" Package Events and Signals
 ---------------------------------------------------------------------
|Code|Description       |Event|Signal |Additional Info                |
|---------------------------------------------------------------------|
| ci |Caller id         |  x  |   -   |                               |
| hd |Offhook           |  -  |  BR   |                               |
| hf |Hook flash        |  -  |  BR   |                               |
| hu |Onhook            |  -  |  BR   |                               |
| oc |Operation Complete|  x  |   -   |                               |
| of |Operation Fail    |  x  |   -   |                               |
|rel |Release call      |  P  |   -   |                               |
| rg |Ringing           | P,S |   -   |                               |
|rlc |Release complete  | P,S |   -   |                               |
|sup |Call Setup        |  -  |  TO   |Time-out when signal completes |
|    |                  |     |       | out-pulsing                   |
 ---------------------------------------------------------------------






























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RFC 3064                   MGCP CAS Packages               February 2001