1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 % TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU4%,%0(/.%G0G0.%47/2+G0G0!.$G0G0)3$./0%2!4)/. G0G0.5-“%2). G0G02/54).!.$G0G0-/“),%G0G03%26)#%4)-%4!“,%G0G0b) comparable treatment for transit calls;c) capability for conducting digit analysis for ISDNs and PST
2、Ns as indicated in Recommendation E.164;d) screening to ensure that, taking into account agreements between the networks concerned, no transit callsare offered to non-conforming networks incapable of handling number lengths as defined inRecommendation E.164;e) provision of interim procedures, such a
3、s two-stage selection, for internal network sources, e.g., localexchanges, not equipped to handle 15 digits, so that all internal network sources can originate calls to allE.164 addresses.Note 1 - Other requirements on conforming networks are for further study. Non-conforming networks mayseek bilate
4、ral agreements with conforming networks, or adopt intra-network procedures to provide means by whichsubscribers of the non-conforming networks may originate calls to subscribers connected to ISDNs and PSTNs requiringa number length or analysis in excess of the capabilities of the non-conforming network.Note 2 - Limitations of non-conforming networks and interworking procedures are for further study.
