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INTERNATIONAL TELECOMMUNICATION UNION
ITU-T RECOMMENDATION SUMMARY
Rec. No. : E.173
Title : Routing plan for interconnection between public land mobile
networks and fixed terminal networks
Study Group : II - Network operation
Version : New
Date of adoption : 1991
Notes :
With the worldwide introduction of public land mobile service there
exists a need for interconnection between public land mobile networks
(PLMN) and fixed terminal networks (e.g. PSTN/ISDN and PSPDN).
Recommendation E.173 covers the routing plan for interconnection
between PLMN and the public switched telephone network/integrated
services digital network (PSTN/ISDN) and between PLMN and the public
data networks (PDN).
It provides guidelines for routing when interconnecting PLMN and
fixed terminal networks, and indicates some basic rules for routing
of calls between the networks. Routing between networks must adhere
to regulatory conditions which exist within a given country or
Administration. Bilateral agreements may be required to establish
the actual interconnection arrangements between network operators.
Recommendation E.173 covers terrestrial-based PLMNs. Satellite-based
PLMNs are for further study.
To order the complete text of this Recommendation, please use the
Order Form for ITU-T Recommendations. An electronic version of this
form is available on ITUDOC (Winword: UPI=ITU-5265; ASCII: UPI=ITU-2488).