-----Original Message----- From: Lyons, Terry Sent: Monday, March 18, 2002 4:47 PM To: imtch323implementors@mail.imtc.org Cc: ITU-SG16@echo.jf.INTEL.COM; Lyons, Terry Subject: Question about "packet-based network originated call"

Is this restriction of H.225.0 enforceable?

Numbering plan identification (octet No. 3, bits 1-4)

• Encoded following the values and rules of Table 4-11/Q.931.  A
  

number in the form of a dialed digit string should be coded as '0000' Unknown. If set to '1001' (Private Numbering Plan) in a packet-based network originated call, this indicates that: 1) the dialed digit string is not present in Setup; and 2) the call will be routed via an alias address in the User-user information.

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1. How can one tell if it's a "packet-based network originated call"?

All H.323 Setups of practical interest are carried over a packet-based network, ie. IP, but did they originate there or were they gatewayed from a circuit-based network? Or is the quoted phrase trying to make some other distinction?

2. Talk of the dialed digit string and routing seems to fit best 7.2.2.4

Called Party Number. However, the passage reproduced above comes from 7.2.2.6 Calling Party Number.

• TLyons@sonusnet.com +1 732 625-3003 ext 212