add configurations to connect to Sprint's 3G network.

share/examples/pppd/sprint3G

@@ -0,0 +1,27 @@
+# $NetBSD: sprint3G,v 1.1 2012/11/01 00:40:22 christos Exp $
+# Script to connect to Sprint-3G's service.
+#
+#kdebug 10
+#debug 10
+/dev/ttyU0 460800
+holdoff 10
+#idle 600
+demand
+#active-filter-out "icmp or (udp and not udp port route) or (tcp and not tcp port ntp)"
+#active-filter-in "icmp or (udp and not udp port route) or (tcp and not tcp port ntp)"
+#pass-filter-in "tcp or (udp and not udp port route) or icmp"
+#pass-filter-out "tcp or (udp and not udp port route) or icmp"
+#netmask 0xffffff00
+ipcp-accept-local
+#lcp-echo-failure 5
+#lcp-echo-interval 5
+#mtu 296
+defaultroute
+crtscts
+modem
+lock
+connect /etc/ppp/connect/sprint3G.chat
+noauth
+user
+password
+usepeerdns

share/examples/pppd/sprint3G.chat

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+#!/bin/sh
+chat -t 100 -v ''	'ATZ' \
+      'OK' 		'ATDT#777' \
+      TIMEOUT		120 \
+      'CONNECT'   	'\c'