Re: [asterisk-users] One PRI card with 2 (or more) Telcos
Just a follow up with a bit more information asterisk*CLI module show like timing Module Description Use Count res_timing_pthread.so pthread Timing Interface 0 *res_timing_dahdi.soDAHDI Timing Interface 40* 2 modules loaded asterisk*CLI -- [root@asterisk ~]# dahdi_test -c 100 Opened pseudo dahdi interface, measuring accuracy... 99.999% 99.999% 99.992% 99.997% 99.998% 99.995% 99.998% 99.996% 99.997% 99.998% 99.997% 99.994% 99.991% 99.999% 99.998% 99.998% 99.995% 99.993% 99.998% 99.999% 99.998% 99.995% 99.992% 99.998% 100.000% 99.998% 99.995% 99.992% 99.999% 99.998% 99.998% 99.999% 99.995% 99.999% 99.999% 99.998% 99.999% 99.997% 99.999% 99.998% 99.998% 99.996% 99.992% 99.998% 99.998% 99.999% 99.996% 99.992% 99.999% 99.998% 99.997% 99.997% 99.997% 99.998% 99.995% 99.994% 99.995% 99.992% 99.999% 99.993% 99.990% 99.995% 99.993% 99.999% 99.997% 99.993% 99.999% 99.996% 99.998% 99.996% 99.993% 99.995% 99.992% 99.998% 99.993% 99.993% 99.999% 99.993% 99.998% 99.996% 99.993% 99.996% 99.996% 99.994% 99.999% 99.996% 99.996% 99.992% 99.999% 99.996% 99.991% 99.996% 99.992% 99.998% 99.997% 99.994% 99.998% 99.995% --- Results after 98 passes --- Best: 100.000 -- Worst: 99.990 -- Average: 99.996163, Difference: 99.998235 -- [root@asterisk ~]# cat /sys/devices/system/clocksource/clocksource0/current_clocksource *tsc* [root@asterisk ~]# cat /sys/devices/system/clocksource/clocksource0/available_clocksource tsc hpet acpi_pm jiffies On 18 March 2011 17:52, Tiago Geada tiago.ge...@gmail.com wrote: Hi list! We currently have a PRI gateway composed by a box with two Digium quad-span PRI cards (a TE420 and a ). One of the cards is filled with TELCO1, while the other has first two slots filled with TELCO2, and 3rd slot with TELCO3. I am currently having (timer ?) issues on TELCO3 (span 7) D-Chan (202 as determined by dahdi_genconf ) is constantly failing causing on-going calls to terminate. Problem clears immediately tho. I send a copy of the log with pri debug at a time of problems... Is there a problem having 2 telcos on the same PRI card? Would somebody help? asterisk*CLI pri show span 7 Primary D-channel: 202 Status: Provisioned, Up, Active Switchtype: EuroISDN Type: CPE Overlap Dial: 0 Logical Channel Mapping: 0 Timer and counter settings: N200: 3 N202: 3 K: 7 T200: 1000 T202: 1 T203: 1 T303: 4000 T305: 3 T308: 4000 T309: 6000 T313: 4000 T-HOLD: 4000 T-RETRIEVE: 4000 T-RESPONSE: 4000 Overlap Recv: No and [Mar 18 17:04:05] VERBOSE[19844] chan_dahdi.c: TEI=0 MDL-ERROR (I): T200 expired N200 times sending RR/RNR in state 8(Timer recovery) [Mar 18 17:04:05] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:05] VERBOSE[19844] chan_dahdi.c: Changing from state 8(Timer recovery) to 5(Awaiting establishment) [Mar 18 17:04:06] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:07] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:08] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: TEI=0 MDL-ERROR (G): *T200 expired N200 times sending SABME in state 5(Awaiting establishment)* [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Changing from state 5(Awaiting establishment) to 4(TEI assigned) [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3) [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Start T309 for call cref=56 on channel 2 [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Start T309 for call cref=64 on channel 3 [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Start T309 for call cref=58 on channel 4 [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Start T309 for call cref=66 on channel 6 [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Changing from state 4(TEI assigned) to 5(Awaiting establishment) [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: == Primary D-Channel on span 7 down [Mar 18 17:04:09] WARNING[19844] chan_dahdi.c: No D-channels available! Using Primary channel 202 as D-channel anyway! [Mar 18 17:04:10] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:11] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:12] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:13] VERBOSE[19844] chan_dahdi.c: TEI=0 MDL-ERROR (G): T200 expired N200 times sending SABME in state 5(Awaiting establishment) [Mar 18 17:04:13] VERBOSE[19844] chan_dahdi.c: Changing from state 5(Awaiting establishment) to 4(TEI assigned) [Mar 18 17:04:13] VERBOSE[19844] chan_dahdi.c: TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3) [Mar 18 17:04:13] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:13] VERBOSE[19844] chan_dahdi.c: Changing from state 4(TEI assigned) to 5(Awaiting
Re: [asterisk-users] One PRI card with 2 (or more) Telcos
Is there a problem having 2 telcos on the same PRI card? I think you go with one master timer as the Telco. Then the other spans are secondary, tertiary, quaternary timers. Adrian -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] One PRI card with 2 (or more) Telcos
On Fri, Mar 18, 2011 at 3:15 PM, Tiago Geada tiago.ge...@gmail.com wrote: Just a follow up with a bit more information asterisk*CLI module show like timing Module Description Use Count res_timing_pthread.so pthread Timing Interface 0 res_timing_dahdi.so DAHDI Timing Interface 40 2 modules loaded asterisk*CLI -- [root@asterisk ~]# dahdi_test -c 100 Opened pseudo dahdi interface, measuring accuracy... 99.999% 99.999% 99.992% 99.997% 99.998% 99.995% 99.998% 99.996% 99.997% 99.998% 99.997% 99.994% 99.991% 99.999% 99.998% 99.998% 99.995% 99.993% 99.998% 99.999% 99.998% 99.995% 99.992% 99.998% 100.000% 99.998% 99.995% 99.992% 99.999% 99.998% 99.998% 99.999% 99.995% 99.999% 99.999% 99.998% 99.999% 99.997% 99.999% 99.998% 99.998% 99.996% 99.992% 99.998% 99.998% 99.999% 99.996% 99.992% 99.999% 99.998% 99.997% 99.997% 99.997% 99.998% 99.995% 99.994% 99.995% 99.992% 99.999% 99.993% 99.990% 99.995% 99.993% 99.999% 99.997% 99.993% 99.999% 99.996% 99.998% 99.996% 99.993% 99.995% 99.992% 99.998% 99.993% 99.993% 99.999% 99.993% 99.998% 99.996% 99.993% 99.996% 99.996% 99.994% 99.999% 99.996% 99.996% 99.992% 99.999% 99.996% 99.991% 99.996% 99.992% 99.998% 99.997% 99.994% 99.998% 99.995% --- Results after 98 passes --- Best: 100.000 -- Worst: 99.990 -- Average: 99.996163, Difference: 99.998235 -- [root@asterisk ~]# cat /sys/devices/system/clocksource/clocksource0/current_clocksource tsc [root@asterisk ~]# cat /sys/devices/system/clocksource/clocksource0/available_clocksource tsc hpet acpi_pm jiffies On 18 March 2011 17:52, Tiago Geada tiago.ge...@gmail.com wrote: Hi list! We currently have a PRI gateway composed by a box with two Digium quad-span PRI cards (a TE420 and a ). One of the cards is filled with TELCO1, while the other has first two slots filled with TELCO2, and 3rd slot with TELCO3. I am currently having (timer ?) issues on TELCO3 (span 7) D-Chan (202 as determined by dahdi_genconf ) is constantly failing causing on-going calls to terminate. Problem clears immediately tho. I send a copy of the log with pri debug at a time of problems... Is there a problem having 2 telcos on the same PRI card? Would somebody help? asterisk*CLI pri show span 7 Primary D-channel: 202 Status: Provisioned, Up, Active Switchtype: EuroISDN Type: CPE Overlap Dial: 0 Logical Channel Mapping: 0 Timer and counter settings: N200: 3 N202: 3 K: 7 T200: 1000 T202: 1 T203: 1 T303: 4000 T305: 3 T308: 4000 T309: 6000 T313: 4000 T-HOLD: 4000 T-RETRIEVE: 4000 T-RESPONSE: 4000 Overlap Recv: No and [Mar 18 17:04:05] VERBOSE[19844] chan_dahdi.c: TEI=0 MDL-ERROR (I): T200 expired N200 times sending RR/RNR in state 8(Timer recovery) [Mar 18 17:04:05] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:05] VERBOSE[19844] chan_dahdi.c: Changing from state 8(Timer recovery) to 5(Awaiting establishment) [Mar 18 17:04:06] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:07] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:08] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: TEI=0 MDL-ERROR (G): T200 expired N200 times sending SABME in state 5(Awaiting establishment) [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Changing from state 5(Awaiting establishment) to 4(TEI assigned) [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3) [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Start T309 for call cref=56 on channel 2 [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Start T309 for call cref=64 on channel 3 [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Start T309 for call cref=58 on channel 4 [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Start T309 for call cref=66 on channel 6 [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: Changing from state 4(TEI assigned) to 5(Awaiting establishment) [Mar 18 17:04:09] VERBOSE[19844] chan_dahdi.c: == Primary D-Channel on span 7 down [Mar 18 17:04:09] WARNING[19844] chan_dahdi.c: No D-channels available! Using Primary channel 202 as D-channel anyway! [Mar 18 17:04:10] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:11] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:12] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending SABME [Mar 18 17:04:13] VERBOSE[19844] chan_dahdi.c: TEI=0 MDL-ERROR (G): T200 expired N200 times sending SABME in state 5(Awaiting establishment) [Mar 18 17:04:13] VERBOSE[19844] chan_dahdi.c: Changing from state 5(Awaiting establishment) to 4(TEI assigned) [Mar 18 17:04:13] VERBOSE[19844] chan_dahdi.c: TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3) [Mar 18 17:04:13] VERBOSE[19844] chan_dahdi.c: TEI=0 Sending
Re: [asterisk-users] One PRI card with 2 (or more) Telcos
On Fri, Mar 18, 2011 at 3:17 PM, Adrian Serafini adrian-li...@wombit.com wrote: Is there a problem having 2 telcos on the same PRI card? I think you go with one master timer as the Telco. Then the other spans are secondary, tertiary, quaternary timers. Adrian Adrian This only works when all the providers are using a common clock like some areas in the USA. This is not the case all around the world. -- ~~~ Andrew lathama Latham lath...@gmail.com ~~~ -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] One PRI card with 2 (or more) Telcos
Hi! I can try that tho. Where do I configure what timer to use??! Thanks in advance. On 18 March 2011 18:21, Andrew Latham lath...@gmail.com wrote: On Fri, Mar 18, 2011 at 3:17 PM, Adrian Serafini adrian-li...@wombit.com wrote: Is there a problem having 2 telcos on the same PRI card? I think you go with one master timer as the Telco. Then the other spans are secondary, tertiary, quaternary timers. Adrian Adrian This only works when all the providers are using a common clock like some areas in the USA. This is not the case all around the world. -- ~~~ Andrew lathama Latham lath...@gmail.com ~~~ -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] One PRI card with 2 (or more) Telcos
OK I found it. In /etc/dahdi/system.conf I have for this span: # Span 7: TE4/1/3 T4XXP (PCI) Card 1 Span 3 HDB3/CCS/CRC4 span=7,7,0,ccs,hdb3,crc4 # termtype: te bchan=187-201,203-217 dchan=202 echocanceller=mg2,187-201,203-217 should I use span=7,*5*,0,ccs,hdb3,crc4 instead? (5 is the first telco on that card) On 18 March 2011 18:23, Tiago Geada tiago.ge...@gmail.com wrote: Hi! I can try that tho. Where do I configure what timer to use??! Thanks in advance. On 18 March 2011 18:21, Andrew Latham lath...@gmail.com wrote: On Fri, Mar 18, 2011 at 3:17 PM, Adrian Serafini adrian-li...@wombit.com wrote: Is there a problem having 2 telcos on the same PRI card? I think you go with one master timer as the Telco. Then the other spans are secondary, tertiary, quaternary timers. Adrian Adrian This only works when all the providers are using a common clock like some areas in the USA. This is not the case all around the world. -- ~~~ Andrew lathama Latham lath...@gmail.com ~~~ -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] One PRI card with 2 (or more) Telcos
On 03/18/2011 01:23 PM, Tiago Geada wrote: Hi! I can try that tho. Where do I configure what timer to use??! If your telcos are not synchronizing their network clocks to each other, you will not be able to solve this problem on a multi-port Digium T1/E1 card. Digium T1/E1 cards select a single master clock (either the onboard clock or the clock recovered from one of the spans) to use as the 'board clock', which is then used to transmit data on all the spans. If the master clock is not in synchronization with the clocks at the other end of those spans, then bit slips will occur and cause various sorts of problems. This is why a card is always configured to use the recovered clock from a telco span if there is one, because the onboard clock would never by in sync with it. If you have a board connected to two telcos and their clocks are not synchronized, not only will you have trouble using a Digium card, but even using a card that can handle using multiple transmit clocks at once will not solve the underlying bit slip problem that will occur if you ever connect a channel from Telco1 to a channel from Telco2. If you *never* connect channels between Telcos, then you don't have to worry about that problem, but if you do, at some point during the call there will be buffer overruns or underruns and there will be some effect (for a normal voice call, the effect might be a short audio artifact, and fairly harmless... unless the call is a modem or FAX call, in which case it could cause the call to fail). For your sanity, I would strongly suggest that you don't connect spans from multiple telcos/networks/etc. on a single card, but keep each span provider on their own card. -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] One PRI card with 2 (or more) Telcos
Sorry to keep bugging, but after making changes to /etc/dahdi/system.conf, do I need unload res_timing_dahdi.so and chan_dahdi.so; and load them, or can I just reload them?? Thanks in advance On 18 March 2011 18:26, Tiago Geada tiago.ge...@gmail.com wrote: OK I found it. In /etc/dahdi/system.conf I have for this span: # Span 7: TE4/1/3 T4XXP (PCI) Card 1 Span 3 HDB3/CCS/CRC4 span=7,7,0,ccs,hdb3,crc4 # termtype: te bchan=187-201,203-217 dchan=202 echocanceller=mg2,187-201,203-217 should I use span=7,*5*,0,ccs,hdb3,crc4 instead? (5 is the first telco on that card) On 18 March 2011 18:23, Tiago Geada tiago.ge...@gmail.com wrote: Hi! I can try that tho. Where do I configure what timer to use??! Thanks in advance. On 18 March 2011 18:21, Andrew Latham lath...@gmail.com wrote: On Fri, Mar 18, 2011 at 3:17 PM, Adrian Serafini adrian-li...@wombit.com wrote: Is there a problem having 2 telcos on the same PRI card? I think you go with one master timer as the Telco. Then the other spans are secondary, tertiary, quaternary timers. Adrian Adrian This only works when all the providers are using a common clock like some areas in the USA. This is not the case all around the world. -- ~~~ Andrew lathama Latham lath...@gmail.com ~~~ -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] One PRI card with 2 (or more) Telcos
Probably overkill, but Every time I make a change to dahdi, I do this Service asterisk stop Service dadhi restart Service asterisk start _ From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Tiago Geada Sent: Friday, March 18, 2011 1:31 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] One PRI card with 2 (or more) Telcos Sorry to keep bugging, but after making changes to /etc/dahdi/system.conf, do I need unload res_timing_dahdi.so and chan_dahdi.so; and load them, or can I just reload them?? Thanks in advance On 18 March 2011 18:26, Tiago Geada tiago.ge...@gmail.com wrote: OK I found it. In /etc/dahdi/system.conf I have for this span: # Span 7: TE4/1/3 T4XXP (PCI) Card 1 Span 3 HDB3/CCS/CRC4 span=7,7,0,ccs,hdb3,crc4 # termtype: te bchan=187-201,203-217 dchan=202 echocanceller=mg2,187-201,203-217 should I use span=7,5,0,ccs,hdb3,crc4 instead? (5 is the first telco on that card) On 18 March 2011 18:23, Tiago Geada tiago.ge...@gmail.com wrote: Hi! I can try that tho. Where do I configure what timer to use??! Thanks in advance. On 18 March 2011 18:21, Andrew Latham lath...@gmail.com wrote: On Fri, Mar 18, 2011 at 3:17 PM, Adrian Serafini adrian-li...@wombit.com wrote: Is there a problem having 2 telcos on the same PRI card? I think you go with one master timer as the Telco. Then the other spans are secondary, tertiary, quaternary timers. Adrian Adrian This only works when all the providers are using a common clock like some areas in the USA. This is not the case all around the world. -- ~~~ Andrew lathama Latham lath...@gmail.com ~~~ -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] One PRI card with 2 (or more) Telcos
Hi Kevin, Thanks for your elaborated answer. I will try and set them on the same clock and see if no problem occurs. If so, Different telco's clocks would be in SYNC (I do doubt it). This machine has no more PCI slots available and hardware is damn expensive. Will have to look into it with my boss.. Thanks you. On 18 March 2011 18:30, Kevin P. Fleming kpflem...@digium.com wrote: On 03/18/2011 01:23 PM, Tiago Geada wrote: Hi! I can try that tho. Where do I configure what timer to use??! If your telcos are not synchronizing their network clocks to each other, you will not be able to solve this problem on a multi-port Digium T1/E1 card. Digium T1/E1 cards select a single master clock (either the onboard clock or the clock recovered from one of the spans) to use as the 'board clock', which is then used to transmit data on all the spans. If the master clock is not in synchronization with the clocks at the other end of those spans, then bit slips will occur and cause various sorts of problems. This is why a card is always configured to use the recovered clock from a telco span if there is one, because the onboard clock would never by in sync with it. If you have a board connected to two telcos and their clocks are not synchronized, not only will you have trouble using a Digium card, but even using a card that can handle using multiple transmit clocks at once will not solve the underlying bit slip problem that will occur if you ever connect a channel from Telco1 to a channel from Telco2. If you *never* connect channels between Telcos, then you don't have to worry about that problem, but if you do, at some point during the call there will be buffer overruns or underruns and there will be some effect (for a normal voice call, the effect might be a short audio artifact, and fairly harmless... unless the call is a modem or FAX call, in which case it could cause the call to fail). For your sanity, I would strongly suggest that you don't connect spans from multiple telcos/networks/etc. on a single card, but keep each span provider on their own card. -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
