freeswitch@10.108.226.220@internal> show calls
call_uuid,call_created,call_created_epoch,function,caller_cid_name,caller_cid_num,caller_dest_num,caller_chan_name,caller_uuid,callee_cid_name,callee_cid_num,callee_dest_num,callee_chan_name,callee_uuid,hostname
b0a7bdfd-430d-4746-91a4-8c318f9e1695,2011-04-08 04:22:37,1302207757,switch_ivr_multi_threaded_bridge,700000,700000,700001,sofia/internal/700000@10.108.226.220,b0a7bdfd-430d-4746-91a4-8c318f9e1695,Outbound Call,700001,700001,sofia/internal/sip:700001@10.108.226.44:18692,e2faae72-ef43-4019-b7e6-1120d7e42e1e,localhost.localdomain

4. uuid_hold b0a7bdfd-430d-4746-91a4-8c318f9e1695
2011-04-08 04:27:55.539115 [DEBUG] switch_channel.c:1373 (sofia/internal/700000@10.108.226.220) Callstate Change ACTIVE -> HELD
2011-04-08 04:27:55.539115 [DEBUG] switch_core_session.c:709 Send signal sofia/internal/700000@10.108.226.220 [BREAK]
2011-04-08 04:27:55.539115 [DEBUG] switch_ivr.c:1272 接收消息完毕
2011-04-08 04:27:55.539115 [DEBUG] switch_core_session.c:954 Send signal sofia/internal/sip:700001@10.108.226.44:18692 [BREAK]
2011-04-08 04:27:55.539115 [DEBUG] sofia.c:4646 Channel sofia/internal/700000@10.108.226.220 entering state [calling][0]
2011-04-08 04:27:55.544824 [DEBUG] switch_core_session.c:709 Send signal sofia/internal/sip:700001@10.108.226.44:18692 [BREAK]
2011-04-08 04:27:55.544824 [INFO] sofia.c:729 sofia/internal/700000@10.108.226.220 Update Callee ID to "Outbound Call" <700000>
2011-04-08 04:27:55.547789 [DEBUG] sofia.c:4646 Channel sofia/internal/700000@10.108.226.220 entering state [ready][200]
2011-04-08 04:27:55.547789 [DEBUG] sofia.c:4654 Duplicate SDP
v=0
o=Idefisk_user 47685 6056184806875839522 IN IP4 10.108.226.44
s=Idefisk_user
c=IN IP4 10.108.226.44
t=0 0
m=audio 8000 RTP/AVP 8 97 0 110 3 101
a=rtpmap:8 PCMA/8000
a=rtpmap:97 iLBC/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:110 speex/8000
a=rtpmap:3 GSM/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15

2011-04-08 04:27:55.547789 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[G7221:115:32000:20:48000]
2011-04-08 04:27:55.547789 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[G7221:107:16000:20:32000]
2011-04-08 04:27:55.547789 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[G722:9:8000:20:64000]
2011-04-08 04:27:55.547789 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[PCMU:0:8000:20:64000]
2011-04-08 04:27:55.547789 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[PCMA:8:8000:20:64000]
2011-04-08 04:27:55.547789 [DEBUG] sofia_glue.c:2690 Already using PCMA
2011-04-08 04:27:55.547789 [DEBUG] sofia_glue.c:4571 Set 2833 dtmf send/recv payload to 101
2011-04-08 04:27:55.725181 [DEBUG] switch_ivr.c:563 sofia/internal/sip:700001@10.108.226.44:18692 Command Execute playback(local_stream://moh)
EXECUTE sofia/internal/sip:700001@10.108.226.44:18692 playback(local_stream://moh)
2011-04-08 04:27:55.725181 [DEBUG] mod_local_stream.c:421 Opening Stream [moh/8000] 8000hz
2011-04-08 04:27:55.725181 [DEBUG] switch_ivr_play_say.c:1236 Codec Activated L16@8000hz 1 channels 20ms

2011-04-08 04:34:51.330157 [DEBUG] sofia.c:4646 Channel sofia/internal/700000@10.108.226.220 entering state [received][100]
RECV EVENT
Event-Name: CHANNEL_HOLD
Core-UUID: 5e94c1c9-305d-4c4d-b00c-ea24f6346559
FreeSWITCH-Hostname: localhost.localdomain
FreeSWITCH-IPv4: 10.108.226.220
FreeSWITCH-IPv6: ::1
Event-Date-Local: 2011-04-08 04:34:51
Event-Date-GMT: Thu, 07 Apr 2011 20:34:51 GMT
Event-Date-Timestamp: 1302208491330157
Event-Calling-File: switch_channel.c
Event-Calling-Function: switch_channel_mark_hold
Event-Calling-Line-Number: 642
Channel-State: CS_EXECUTE
Channel-Call-State: HELD
Channel-State-Number: 4
Channel-Name: sofia/internal/700000@10.108.226.220
Unique-ID: eb1222c9-4175-469a-8549-667c0dd921a6
Call-Direction: inbound
Presence-Call-Direction: inbound
Channel-Presence-ID: 700000@10.108.226.220
Channel-Call-UUID: eb1222c9-4175-469a-8549-667c0dd921a6
Answer-State: answered
Channel-Read-Codec-Name: PCMA
Channel-Read-Codec-Rate: 8000
Channel-Read-Codec-Bit-Rate: 64000
Channel-Write-Codec-Name: PCMA
Channel-Write-Codec-Rate: 8000
Channel-Write-Codec-Bit-Rate: 64000
Caller-Direction: inbound
Caller-Username: 700000
Caller-Dialplan: XML
Caller-Caller-ID-Name: 700000
Caller-Caller-ID-Number: 700000
Caller-Callee-ID-Name: Outbound Call
Caller-Callee-ID-Number: 700001
Caller-Network-Addr: 10.108.226.44
Caller-ANI: 700000
Caller-Destination-Number: 700001
Caller-Unique-ID: eb1222c9-4175-469a-8549-667c0dd921a6
Caller-Source: mod_sofia
Caller-Context: default
Caller-Channel-Name: sofia/internal/700000@10.108.226.220
Caller-Profile-Index: 1
Caller-Profile-Created-Time: 1302208456152936
Caller-Channel-Created-Time: 1302208456152936
Caller-Channel-Answered-Time: 1302208463040930
Caller-Channel-Progress-Time: 1302208456340619
Caller-Channel-Progress-Media-Time: 0
Caller-Channel-Hangup-Time: 0
Caller-Channel-Transfer-Time: 0
Caller-Screen-Bit: true
Caller-Privacy-Hide-Name: false
Caller-Privacy-Hide-Number: false
Other-Type: originatee
Other-Leg-Direction: outbound
Other-Leg-Username: 700000
Other-Leg-Dialplan: XML
Other-Leg-Caller-ID-Name: 700000
Other-Leg-Caller-ID-Number: 700000
Other-Leg-Callee-ID-Name: Outbound Call
Other-Leg-Callee-ID-Number: 700001
Other-Leg-Network-Addr: 10.108.226.44
Other-Leg-ANI: 700000
Other-Leg-Destination-Number: 700001
Other-Leg-Unique-ID: 1595a55f-d97c-47c1-aa6c-42c8efcb5b27
Other-Leg-Source: mod_sofia
Other-Leg-Context: default
Other-Leg-Channel-Name: sofia/internal/sip:700001@10.108.226.44:18692
Other-Leg-Screen-Bit: true
Other-Leg-Privacy-Hide-Name: false
Other-Leg-Privacy-Hide-Number: false

2011-04-08 04:34:51.330157 [DEBUG] switch_channel.c:1373 (sofia/internal/700000@10.108.226.220) Callstate Change ACTIVE -> HELD
2011-04-08 04:34:51.330157 [DEBUG] switch_core_session.c:954 Send signal sofia/internal/sip:700001@10.108.226.44:18692 [BREAK]
2011-04-08 04:34:51.346542 [DEBUG] switch_core_session.c:709 Send signal sofia/internal/sip:700001@10.108.226.44:18692 [BREAK]
2011-04-08 04:34:51.524112 [DEBUG] switch_ivr.c:563 sofia/internal/sip:700001@10.108.226.44:18692 Command Execute playback(local_stream://moh)
EXECUTE sofia/internal/sip:700001@10.108.226.44:18692 playback(local_stream://moh)
2011-04-08 04:34:51.524112 [DEBUG] mod_local_stream.c:421 Opening Stream [moh/8000] 8000hz
2011-04-08 04:34:51.524112 [DEBUG] switch_ivr_play_say.c:1236 Codec Activated L16@8000hz 1 channels 20ms
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[G7221:115:32000:20:48000]
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[G7221:107:16000:20:32000]
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[G722:9:8000:20:64000]
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[PCMU:0:8000:20:64000]
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:4467 Audio Codec Compare [PCMA:8:8000:20:64000]/[PCMA:8:8000:20:64000]
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:2690 Already using PCMA
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:4571 Set 2833 dtmf send/recv payload to 101
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:2976 Audio params changed for sofia/internal/700000@10.108.226.220 from 10.108.226.44:8000 to 0.0.0.0:8000
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:2987 AUDIO RTP [sofia/internal/700000@10.108.226.220] 10.108.226.220 port 19022 -> 0.0.0.0 port 8000 codec: 8 ms: 20
2011-04-08 04:34:51.580870 [DEBUG] sofia_glue.c:3017 AUDIO RTP CHANGING DEST TO: [0.0.0.0:8000]
2011-04-08 04:34:51.580870 [DEBUG] sofia.c:5057 Processing updated SDP
2011-04-08 04:34:51.583974 [DEBUG] sofia.c:4646 Channel sofia/internal/700000@10.108.226.220 entering state [completed][200]
2011-04-08 04:34:51.583974 [DEBUG] sofia.c:4646 Channel sofia/internal/700000@10.108.226.220 entering state [ready][200]

I just tried this on latest git and it worked fine for me. Can you pastebin the console debug output when you use it?
-MC

2011/4/2 张明 <sc_zhangming@sina.com>

freeswitch-users，您好！

uuid_hold command , freeswitch is not send HOLD message. who know it.

　　　　　　　　致
礼！

　　　　　　　　张明
　　　　　　　　sc_zhangming@sina.com
　　　　　　　　　　2011-04-02
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