All Rights Reserved © Alcatel-Lucent 2007 31 | RADIUS protocol Overview Example of pre-auth for dataphones (PoS) The RADIUS server instructs the NAS how to handle this call, and even what modulation to use Before taking the call off-hook PSTN Access-Accept (2) - ID=10 User-Name = PoS , Service-Type = Login Login-Service = TCP-clear, Login-IP-Host = 192.168.20.4, Login-TCP-Port = 8419 Ascend-AT-Answer-String = &t4s18=15+MS=1 &g2S220=11S221=50S10=3 The bank system has a X.25 network PAD IP X.25 RADIUS server Bank X NAS Access-Request (1) - ID=10 User-Name (1) = 090 User-Password (2) = Ascend-DNIS NAS-IP-Address (4) = 192.168.20.2 NAS-Port (5) = 20 NAS-Port-Type (61) = Async (0) Service-Type (6) = Call-Check (10) Called-Station-Id (30) = 090 Calling-Station-Id (31) = 918078419 *
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