Predefined sounds
There are some predefined system sounds, for the system sound ID in the range 1000 to 2000 (decimal), as shown below (from 2.0 to 5.0 beta). The system sounds are all stored in /System/Library/Audio/UISounds/.

Sound ID
File name (iPhone)
File name (iPod Touch)
Category
Note
1015
Voicemail.caf
Voicemail.caf
-
Available since 2.1
1070
ct-busy.caf
ct-busy.caf
AudioToneBusy
There was no category for this sound before 4.0.
1074
ct-call-waiting.caf
ct-call-waiting.caf
AudioToneCallWaiting
There was no category for this sound before 4.0.
1071
ct-congestion.caf
ct-congestion.caf
AudioToneCongestion
There was no category for this sound before 4.0.
1073
ct-error.caf
ct-error.caf
AudioToneError
There was no category for this sound before 4.0.
1075
ct-keytone2.caf
ct-keytone2.caf
AudioToneKey2
There was no category for this sound before 4.0.
1072
ct-path-ack.caf
ct-path-ack.caf
AudioTonePathAcknowledge
There was no category for this sound before 4.0.
1113
begin_record.caf
begin_record.caf
BeginRecording
Available since 3.0
1117
begin_video_record.caf
begin_video_record.caf
BeginVideoRecording
Available since 3.0
1005
alarm.caf
sq_alarm.caf
CalendarAlert

1108
photoShutter.caf
photoShutter.caf
CameraShutter

1106
beep-beep.caf
sq_beep-beep.caf
ConnectedToPower

1114
end_record.caf
end_record.caf
EndRecording
Available since 3.0
1118
end_video_record.caf
end_video_record.caf
EndVideoRecording
Available since 3.0
1102
-
-
FailedUnlock

1256
short_low_high.caf
short_low_high.caf
Headset_AnswerCall

1258
short_double_low.caf
short_double_low.caf
Headset_CallWaitingActions

1257
short_double_low.caf
short_double_low.caf
Headset_EndCall

1255
short_double_high.caf
short_double_high.caf
Headset_Redial

1254
long_low_short_high.caf
long_low_short_high.caf
Headset_StartCall

1259
middle_9_short_double_low.caf
middle_9_short_double_low.caf
Headset_TransitionEnd

1115
jbl_ambiguous.caf
jbl_ambiguous.caf
JBL_Ambiguous
Available since 3.0
1110
jbl_begin.caf
jbl_begin.caf
JBL_Begin
Available since 3.0
1112
jbl_cancel.caf
jbl_cancel.caf
JBL_Cancel
Available since 3.0
1111
jbl_confirm.caf
jbl_confirm.caf
JBL_Confirm
Available since 3.0
1116
jbl_no_match.caf
jbl_no_match.caf
JBL_NoMatch
Available since 3.0
1306
Tock.caf
sq_tock.caf
KeyPressClickPreview
The category was SystemSoundPreview before 3.2.
1103
Tink.caf
sq_tock.caf
KeyPressed

1104
Tock.caf
sq_tock.caf
KeyPressed

1105
Tock.caf
sq_tock.caf
KeyPressed

1006
low_power.caf
low_power.caf
LowPower

1000
new-mail.caf
new-mail.caf
MailReceived

1001
mail-sent.caf
mail-sent.caf
MailSent

1057
Tink.caf
Tink.caf
PINKeyPressed

1107
RingerChanged.caf
RingerChanged.caf
RingerSwitchIndication

1350
-
-
RingerVibeChanged

1100
lock.caf
sq_lock.caf
ScreenLocked

1101
unlock.caf
sq_lock.caf
ScreenUnlocked

1109
shake.caf
shake.caf
ShakeToShuffle
Available since 3.0
1351
-
-
SilentVibeChanged

1051
SIMToolkitCallDropped.caf
SIMToolkitCallDropped.caf
SIMToolkitTone

1052
SIMToolkitGeneralBeep.caf
SIMToolkitGeneralBeep.caf
SIMToolkitTone

1053
SIMToolkitNegativeACK.caf
SIMToolkitNegativeACK.caf
SIMToolkitTone

1054
SIMToolkitPositiveACK.caf
SIMToolkitPositiveACK.caf
SIMToolkitTone

1055
SIMToolkitSMS.caf
SIMToolkitSMS.caf
SIMToolkitTone

1003
ReceivedMessage.caf
ReceivedMessage.caf
SMSReceived

1007
sms-received1.caf
sms-received1.caf
SMSReceived_Alert

1008
sms-received2.caf
sms-received2.caf
SMSReceived_Alert

1009
sms-received3.caf
sms-received3.caf
SMSReceived_Alert

1010
sms-received4.caf
sms-received4.caf
SMSReceived_Alert

1012
sms-received1.caf
sms-received1.caf
SMSReceived_Alert

1013
sms-received5.caf
sms-received5.caf
SMSReceived_Alert

1014
sms-received6.caf
sms-received6.caf
SMSReceived_Alert

1020
Anticipate.caf
Anticipate.caf
SMSReceived_Alert
Available since 4.2
1021
Bloom.caf
Bloom.caf
SMSReceived_Alert
Available since 4.2
1022
Calypso.caf
Calypso.caf
SMSReceived_Alert
Available since 4.2
1023
Choo_Choo.caf
Choo_Choo.caf
SMSReceived_Alert
Available since 4.2
1024
Descent.caf
Descent.caf
SMSReceived_Alert
Available since 4.2
1025
Fanfare.caf
Fanfare.caf
SMSReceived_Alert
Available since 4.2
1026
Ladder.caf
Ladder.caf
SMSReceived_Alert
Available since 4.2
1027
Minuet.caf
Minuet.caf
SMSReceived_Alert
Available since 4.2
1028
News_Flash.caf
News_Flash.caf
SMSReceived_Alert
Available since 4.2
1029
Noir.caf
Noir.caf
SMSReceived_Alert
Available since 4.2
1030
Sherwood_Forest.caf
Sherwood_Forest.caf
SMSReceived_Alert
Available since 4.2
1031
Spell.caf
Spell.caf
SMSReceived_Alert
Available since 4.2
1032
Suspense.caf
Suspense.caf
SMSReceived_Alert
Available since 4.2
1033
Telegraph.caf
Telegraph.caf
SMSReceived_Alert
Available since 4.2
1034
Tiptoes.caf
Tiptoes.caf
SMSReceived_Alert
Available since 4.2
1035
Typewriters.caf
Typewriters.caf
SMSReceived_Alert
Available since 4.2
1036
Update.caf
Update.caf
SMSReceived_Alert
Available since 4.2
1307
sms-received1.caf
sms-received1.caf
SMSReceived_Selection

1308
sms-received2.caf
sms-received2.caf
SMSReceived_Selection

1309
sms-received3.caf
sms-received3.caf
SMSReceived_Selection

1310
sms-received4.caf
sms-received4.caf
SMSReceived_Selection

1312
sms-received1.caf
sms-received1.caf
SMSReceived_Selection

1313
sms-received5.caf
sms-received5.caf
SMSReceived_Selection

1314
sms-received6.caf
sms-received6.caf
SMSReceived_Selection

1320
Anticipate.caf
Anticipate.caf
SMSReceived_Selection
Available since 4.2
1321
Bloom.caf
Bloom.caf
SMSReceived_Selection
Available since 4.2
1322
Calypso.caf
Calypso.caf
SMSReceived_Selection
Available since 4.2
1323
Choo_Choo.caf
Choo_Choo.caf
SMSReceived_Selection
Available since 4.2
1324
Descent.caf
Descent.caf
SMSReceived_Selection
Available since 4.2
1325
Fanfare.caf
Fanfare.caf
SMSReceived_Selection
Available since 4.2
1326
Ladder.caf
Ladder.caf
SMSReceived_Selection
Available since 4.2
1327
Minuet.caf
Minuet.caf
SMSReceived_Selection
Available since 4.2
1328
News_Flash.caf
News_Flash.caf
SMSReceived_Selection
Available since 4.2
1329
Noir.caf
Noir.caf
SMSReceived_Selection
Available since 4.2
1330
Sherwood_Forest.caf
Sherwood_Forest.caf
SMSReceived_Selection
Available since 4.2
1331
Spell.caf
Spell.caf
SMSReceived_Selection
Available since 4.2
1332
Suspense.caf
Suspense.caf
SMSReceived_Selection
Available since 4.2
1333
Telegraph.caf
Telegraph.caf
SMSReceived_Selection
Available since 4.2
1334
Tiptoes.caf
Tiptoes.caf
SMSReceived_Selection
Available since 4.2
1335
Typewriters.caf
Typewriters.caf
SMSReceived_Selection
Available since 4.2
1336
Update.caf
Update.caf
SMSReceived_Selection
Available since 4.2
1011
-
-
SMSReceived_Vibrate

1311
-
-
SMSReceived_Vibrate

1004
SentMessage.caf
SentMessage.caf
SMSSent

1016
tweet_sent.caf
tweet_sent.caf
SMSSent
Available since 5.0
1300
Voicemail.caf
Voicemail.caf
SystemSoundPreview

1301
ReceivedMessage.caf
ReceivedMessage.caf
SystemSoundPreview

1302
new-mail.caf
new-mail.caf
SystemSoundPreview

1303
mail-sent.caf
mail-sent.caf
SystemSoundPreview

1304
alarm.caf
sq_alarm.caf
SystemSoundPreview

1305
lock.caf
sq_lock.caf
SystemSoundPreview

1315
Voicemail.caf
Voicemail.caf
SystemSoundPreview
Available since 2.1
1200
dtmf-0.caf
dtmf-0.caf
TouchTone

1201
dtmf-1.caf
dtmf-1.caf
TouchTone

1202
dtmf-2.caf
dtmf-2.caf
TouchTone

1203
dtmf-3.caf
dtmf-3.caf
TouchTone

1204
dtmf-4.caf
dtmf-4.caf
TouchTone

1205
dtmf-5.caf
dtmf-5.caf
TouchTone

1206
dtmf-6.caf
dtmf-6.caf
TouchTone

1207
dtmf-7.caf
dtmf-7.caf
TouchTone

1208
dtmf-8.caf
dtmf-8.caf
TouchTone

1209
dtmf-9.caf
dtmf-9.caf
TouchTone

1210
dtmf-star.caf
dtmf-star.caf
TouchTone

1211
dtmf-pound.caf
dtmf-pound.caf
TouchTone

1050
ussd.caf
ussd.caf
USSDAlert

1154
vc~ringing.caf
vc~ringing.caf
VCCallUpgrade
Available since 4.1
1153
ct-call-waiting.caf
ct-call-waiting.caf
VCCallWaiting
Available since 4.1
1152
vc~ended.caf
vc~ended.caf
VCEnded
Available since 4.0
1150
vc~invitation-accepted.caf
vc~invitation-accepted.caf
VCInvitationAccepted
Available since 4.0
1151
vc~ringing.caf
vc~ringing.caf
VCRinging
Available since 4.0
4095
-
-
Vibrate
There was no category for this sound before 2.2.
In the SDK this is the constant kSystemSoundID_Vibrate.
1002
Voicemail.caf
Voicemail.caf
VoicemailReceived