Hi,<br><br>I have a CCM running 4.2 connecting through MGCP to a 2821 Gateway.<br>After some debugging and traces enabled on the CCM I noticed that the calls that are getting disconnected from the PSTN all fall in the first 5 channels of the E1 PRI.
<br><br>These are the relevant commands on the 2821:<br><br>controller E1 0/0/0<br> pri-group timeslots 1-16 service mgcp<br>!<br>interface Serial0/0/0:15<br> no ip address<br> isdn switch-type primary-net5<br> isdn incoming-voice voice
<br> isdn bind-l3 ccm-manager<br> isdn bchan-number-order ascending <br> no cdp enable<br>!<br>ccm-manager mgcp<br>ccm-manager config server <CCM ip address> <br>!<br>mgcp<br>mgcp call-agent <CCM ip address> service-type mgcp version
0.1<br>mgcp dtmf-relay voip codec all mode out-of-band<br>mgcp package-capability rtp-package<br>mgcp default-package line-package<br>mgcp sdp simple<br>!<br>mgcp profile default<br><br>These are two snippets from a 'debug isdn q931':
<br><br>*May 10 11:32:02.582: ISDN Se0/0/0:15 Q931: RX <- SETUP pd = 8 callref = 0x007F <br> Sending Complete <br> Bearer Capability i = 0x9090A3 <br> Standard = CCITT <br> Transfer Capability =
3.1kHz Audio <br> Transfer Mode = Circuit <br> Transfer Rate = 64 kbit/s <br> Channel ID i = 0xA18384 <br> Preferred, Channel 4 <br> Progress Ind i = 0x8183 - Origination address is non-ISDN
<br> Calling Party Number i = 0x0083, 'calling party number' <br> Plan:Unknown, Type:Unknown <br> Called Party Number i = 0x81, 'called party number' <br> Plan:ISDN, Type:Unknown
<br>*May 10 11:32:02.602: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x807F <br> Channel ID i = 0xA98384 <br> Exclusive, Channel 4<br>*May 10 11:32:02.602: ISDN Se0/0/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x807F
<br> Cause i = 0x80A2 - No circuit/channel available<br>*May 10 11:32:02.790: ISDN Se0/0/0:15 Q931: RX <- RELEASE pd = 8 callref = 0x007F<br>*May 10 11:32:02.802: ISDN Se0/0/0:15 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x807F
<br><br><br>*May 10 11:33:35.062: ISDN Se0/0/0:15 Q931: RX <- SETUP pd = 8 callref = 0x0057 <br> Sending Complete <br> Bearer Capability i = 0x9090A3 <br> Standard = CCITT <br> Transfer Capability =
3.1kHz Audio <br> Transfer Mode = Circuit <br> Transfer Rate = 64 kbit/s <br> Channel ID i = 0xA18383 <br> Preferred, Channel 3 <br> Progress Ind i = 0x8283 - Origination address is non-ISDN
<br> Calling Party Number i = 0x0083, 'calling party number' <br> Plan:Unknown, Type:Unknown <br> Called Party Number i = 0x81, 'called party number' <br> Plan:ISDN, Type:Unknown
<br>*May 10 11:33:35.086: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x8057 <br> Channel ID i = 0xA98383 <br> Exclusive, Channel 3<br>*May 10 11:33:35.086: ISDN Se0/0/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x8057
<br> Cause i = 0x80A2 - No circuit/channel available<br><br>In attachment I include a file (copy of ccm00000065.txt) that has the relevant information taken from a CCM Trace log and run through Voice Log Translator.
<br><br>With all this information I went to check the MGCP Gateway configuration in CCMAdmin. Some of the configuration elements included on the E1 endpoint configuration page and that are somewhat confusing me (mind you that this is an inherited configuration) are as follows:
<br><br><span class="content"><span style="font-weight: bold;">
Channel Selection Order</span>: </span><span class="content">BOTTOM_UP (since the configuration on the gateway's </span>interface Serial0/0/0:15 is for bchan-number-order ascending, shouldn't these parameters match by using the TOP_DOWN option?)
<br><br><span class="content"><span style="font-weight: bold;">
Channel IE Type</span>: </span><span class="content">Use Number When 1B (This is an option that I don't fully understand. Any help on this would be appreciated. But to what I understand, and since the E1 PRI configuration is only used for half a primary (15 channels) shouldn't this parameter be set to
</span><span class="content">'Timeslot Number'?)</span><br><br>TIA<br><br clear="all"><br>-- <br>Pedro Miguel Marques