I apologise in advance if this is a silly question, as "legacy" telephone technologies are really not my forte. Is there an E1 card that can provide clock source? (E.g. Make my asterisk server look like a telco to my legacy PBX system?). What I am trying to achieve is the following: --ISDN-------| Asterisk |-------ISDN--------| Legacy PBX |-- -- =========================================Rod Bacon - VOIP Systems Engineer Empowered Communications Ground Floor, 102 York St. South Melbourne Victoria, Australia. 3205 Phone: +613 99401600 Fax: +613 99401650 ==========================================
The Digium cards will work in this situation, just set the appropriate "signalling" paramater in zapata.conf. Nathan. Rod Bacon wrote:> I apologise in advance if this is a silly question, as "legacy" > telephone technologies are really not my forte. > > Is there an E1 card that can provide clock source? (E.g. Make my > asterisk server look like a telco to my legacy PBX system?). > > What I am trying to achieve is the following: > > > --ISDN-------| Asterisk |-------ISDN--------| Legacy PBX |-- > >
> I apologise in advance if this is a silly question, as "legacy" > telephone technologies are really not my forte. > > Is there an E1 card that can provide clock source? (E.g. Make my > asterisk server look like a telco to my legacy PBX system?). > > What I am trying to achieve is the following: > > > --ISDN-------| Asterisk |-------ISDN--------| Legacy PBX |--All E1's and T1's have an embedded clock in the transmit side of the circuit. There is no way to turn it off or on; its part of the spec. You choose whether you want to "use" the provided clocking when you configure the hardware on the end of the E1/T1. For zaptel cards, see the examples in /etc/zaptel.conf.