Die FritzBox verwendet eine gut funktionierende Voreinstellung für O2 DSL SIP-Trunks. Die Folgende Konfiguration wurde aus einem Fritzbox-Dump extrahiert:
ua1 {
enabled = yes;
username = "49813112345678";
authname = "";
authname_needed = no;
passwd = "thaehoothiBei5eeya2ooh8wuin0ee";
registrar = "sip.alice-voip.de";
ttl = 75m;
sipping_enabled = yes;
sipping_interval = 280s;
name = "12345678";
providername = "";
voip_providerlist_id = "alice";
ims_client = no;
with_displayname = no;
read_from_displayname = yes;
dtmfcfg = dtmfcfg_rtp_or_inband;
rtpevent_keep_packetrate = no;
register_failwait = 0w;
register_failwaitmax = 30m;
register_failover_fallback_process = no;
stunserver = "";
stunserverport = 3478;
use_internat_calling_numb = no;
is_nat_aware = no;
localip = 0.0.0.0;
protocolprefer = protocolprefer_ipv6;
ignore_received_header = no;
always_clir = no;
clirtype = clir_rfc3325;
reject_anonymous_call_with_433 = no;
colptype = colp_none;
clipnstype = clipns_off;
vad_enabled = no;
only_one_dialog = no;
presence_supported = no;
mwi_supported = no;
mwi_inmemoria = no;
ccbs_supported = no;
reg_support = regsupport_auto;
packetization = packetization_fixed;
tx_packetsize_in_ms = 20;
xrtp_periodic = 0;
reject_refer = yes;
sip_instance = no;
no_register_fetch = yes;
do_not_register = no;
only_call_from_registrar = no;
mobile_capability = voip_over_mobile_all;
invite_without_register_allowed = no;
outboundproxy = "sip.alice-voip.de";
outboundproxy_without_route_header = no;
factory_3pty_uri = "";
no_hold_speech = no;
dditype = ddi_none;
ddireception = "";
ddimynumber_with_plusprefix = no;
webui_trunk_id = "normal:06078005-170123-80050607-21060721";
alias_head_number = "";
cfxsignaling = cfx_standard;
backup_wanted = no;
use_session_timer = no;
use_rport = yes;
add_rtpmap_for_all_codecs = no;
answer_only_one_codec = no;
without_annexb_no = no;
transport_type = transport_unspec;
srtp_supported = no;
crypto_avp_mode = crypto_mode_avp_only;
use_488_for_no_t38 = no;
g726_via_rfc3551 = no;
no_g726_32_offer_with_pt2 = no;
g726_fixed_ptime30 = no;
dtmf_inband_on_g711g722 = no;
enable_3xx = no;
t38_reinvite_from_remote = no;
use_t38version0 = no;
rtcp_xr_media_attribute = no;
ptime_a_attribute = yes;
tones_and_announcements_for_service = no;
read_p_asserted_identity_header = no;
route_always_over_internet = yes;
sipiface = sipiface_automatic;
altc_attribute_rfc6947 = no;
send_extended_sip_client_info = no;
gui_readonly = no;
convertstate = 2;
snmp_instance = 0;
loopback_client_username_fos = "";
loopback_client_username_pass_through = "";
directloopback_client_username = "";
call_deflection = no;
}