Re: [Asterisk-Users] far end disconnect supervision
I've been reading the list archives and searching Ebay for channel banks. There are lots of Carrier Access Corp (CAC) Access Bank I and II's available but I don't explicitly see anything about calling party disconnect in the user manuals. The CAC Adit 600 manual, on the other hand, states that calling party disconnect is supported on the FXO interfaces. That's great, but I haven't seen any on Ebay and I can't justify the expense of a new unit. Acording to the list archives the Adtran 750/850 units work well but I haven't read the manuals for those units yet. The Adit600 is a Very Good channel bank. They are pricier than the others but IMO they are worth it. Gain settings are electronic rather than dip switch set, they're small and just all around *nice* to use. I can confirm with personal experience that the ABI does *not* support far-end disconnect notification on its FXO ports. The marketing literature mentions it but they do not support it. Regards, Andrew ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] far end disconnect supervision
Personal opinion is that throwing a channel bank at * (other then for better echo cancellation on trunks) is like taking a shower with your socks on; don't see any practical use. But, I'm sure some do. This statement assumes a lot. 1. That you don't want to use analog phones. 2. That you need enough lines for a T1/PRI circuit. In this case the most economical way to deploy a setup of say 5-16 voice lines is with a channel bank and a T1 card in the * server. If there is some less expensive option please share :-). Note the comment in the statement that says other then ... trunks. Full agreement that most channel banks will handle echo cancellation, impedence matching, etc, very well. They've been doing it for years. The comment was oriented towards using a channel bank to connect analog phones to *, and was not intended to start another thread, flames, etc. And, we've all seen the discussion relative to the cost of sip phones vs analog many times over, use of left over slots for phones, etc, etc. If you have a specific case where that makes sense for you or your customer, knock yourself out (that would be the some do part). No need to rehash the I'm cheaper then you are discussions again. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] far end disconnect supervision
Hi! I've not implemented any form of channel bank with *, so can't offer much help on specific vendor/models. Since there are a fair number of folks using them on the list, try posting a new thread with channel bank in the subject, and summarize the responses in the wiki. Yes, please do so at: http://www.voip-info.org/ tiki-index.php?page=Asterisk+hardware+channel+bank+check Cheers, Philipp ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] far end disconnect supervision
Quoting Rich Adamson [EMAIL PROTECTED]: Personal opinion is that throwing a channel bank at * (other then for better echo cancellation on trunks) is like taking a shower with your socks on; don't see any practical use. But, I'm sure some do. This statement assumes a lot. 1. That you don't want to use analog phones. 2. That you need enough lines for a T1/PRI circuit. In this case the most economical way to deploy a setup of say 5-16 voice lines is with a channel bank and a T1 card in the * server. If there is some less expensive option please share :-). Note the comment in the statement that says other then ... trunks. Full agreement that most channel banks will handle echo cancellation, impedence matching, etc, very well. They've been doing it for years. The comment was oriented towards using a channel bank to connect analog phones to *, and was not intended to start another thread, flames, etc. And, we've all seen the discussion relative to the cost of sip phones vs analog many times over, use of left over slots for phones, etc, etc. If you have a specific case where that makes sense for you or your customer, knock yourself out (that would be the some do part). No need to rehash the I'm cheaper then you are discussions again. Yes, I don't want to start a flame war and I am not really even advocating analog phones or a discussion of the relative merits of analog/sip. We are actually going the SIP route. My comment is more from the purspective of someone new to phone systems and what was important for me to learn. I initially thought we would lease a T1/PRI (which is what I normally think of as a trunk line, but obviously that is my limited experience with telephony single single POTS lines are also trunks), but because our call traffic is mostly internal we only need somewhere in the neiborhood of 6-12 phone lines to the PSTN. It took a while for me to realize that it was cheaper to buy a channel bank and a T1 card than to purchase multiple single fxo cards. Visit Winfield Public Schools at http://usd465.com - This mail sent through IMP: http://horde.org/imp/ ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[Asterisk-Users] far end disconnect supervision
I'm starting to shop for my first channel bank and one of the features that eveyone seems to recommend is far end disconnect supervision. What other terms do various manufactures use to describe this same feature ? Is calling party disconnect the same as far end disconnect supervision ? Thanks ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] far end disconnect supervision
I'm starting to shop for my first channel bank and one of the features that eveyone seems to recommend is far end disconnect supervision. What other terms do various manufactures use to describe this same feature ? Is calling party disconnect the same as far end disconnect supervision ? Yes, in most readers terms. However, in some cases marketing/sales people may have written stuff with no clue what they are talking about. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] far end disconnect supervision
If some channel banks don't support this, how on earth do they know when the telco side of the call has hung up ? They don't. They rely on either a timeout or the called party hanging up to disconnect the call. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] far end disconnect supervision
I'm starting to shop for my first channel bank and one of the features that eveyone seems to recommend is far end disconnect supervision. What other terms do various manufactures use to describe this same feature ? Is calling party disconnect the same as far end disconnect supervision ? Yes, in most readers terms. However, in some cases marketing/sales people may have written stuff with no clue what they are talking about. Is far end disconnect supervision BOTH a service/feature/line signaling provided by the Telco AND a feature of some channel banks ? If some channel banks don't support this, how on earth do they know when the telco side of the call has hung up ? If you go way back in history, channel banks were only used by telcos and at least initially were only required to pass signaling between central office switches. It wasn't until fx cards were added that channel banks had to be concerned with calling and called party disconnects. In some states, the regulatory agencies governed what could (or could not) be deployed and under what conditions. Called party disconnect was frequently used by court order for police verification on certain calls, while calling party disconnect was the norm. At that time, customer lines were directly connected to the central office switch, and it was functions within the switch that controlled calling/called party disconnects. If the telco deployed a channel bank with fx-type customer interfaces, the channel bank would need to support calling and called party disconnect in order to inform the central office switch of call status. If the telco deployed a channel bank with interfaces to a customer's pbx where signaling used tones (as an example), the channel bank would not need the added electronics to support disconnect supervision. Disconnect supervision refers to opening/closing the 2-wire circuit (as in hanging up a telephone), and in some cases, reversing tip/ring (48 volt polarity change). (There are a number of other interfaces available for channel banks beside those designed for two-wire fx's.) Since there are lots of old (and new) channel banks being sold on ebay, etc, that may have been designed for different purposes, some will support disconnect supervision while others do not, some are two-wire while others are four-wire, some support E M signaling (extra wires per channel), some supply 100vac ringing voltage while others do not, some run on only 48 volt DC power while others are 110 vac power, etc. If you're looking for a channel bank to interface phones with asterisk, then keywords would include 2-wire, disconnect supervision, fx lines, etc. Might also ensure it can supply the needed 100 vac ringing voltage (historically referred to as a ring generator). ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] far end disconnect supervision
Rich Adamson wrote: I'm starting to shop for my first channel bank and one of the features that eveyone seems to recommend is far end disconnect supervision. What other terms do various manufactures use to describe this same feature ? Is calling party disconnect the same as far end disconnect supervision ? Yes, in most readers terms. However, in some cases marketing/sales people may have written stuff with no clue what they are talking about. Is far end disconnect supervision BOTH a service/feature/line signaling provided by the Telco AND a feature of some channel banks ? If some channel banks don't support this, how on earth do they know when the telco side of the call has hung up ? If you go way back in history, channel banks were only used by telcos and at least initially were only required to pass signaling between central office switches. It wasn't until fx cards were added that channel banks had to be concerned with calling and called party disconnects. In some states, the regulatory agencies governed what could (or could not) be deployed and under what conditions. Called party disconnect was frequently used by court order for police verification on certain calls, while calling party disconnect was the norm. At that time, customer lines were directly connected to the central office switch, and it was functions within the switch that controlled calling/called party disconnects. If the telco deployed a channel bank with fx-type customer interfaces, the channel bank would need to support calling and called party disconnect in order to inform the central office switch of call status. If the telco deployed a channel bank with interfaces to a customer's pbx where signaling used tones (as an example), the channel bank would not need the added electronics to support disconnect supervision. Disconnect supervision refers to opening/closing the 2-wire circuit (as in hanging up a telephone), and in some cases, reversing tip/ring (48 volt polarity change). (There are a number of other interfaces available for channel banks beside those designed for two-wire fx's.) Since there are lots of old (and new) channel banks being sold on ebay, etc, that may have been designed for different purposes, some will support disconnect supervision while others do not, some are two-wire while others are four-wire, some support E M signaling (extra wires per channel), some supply 100vac ringing voltage while others do not, some run on only 48 volt DC power while others are 110 vac power, etc. If you're looking for a channel bank to interface phones with asterisk, then keywords would include 2-wire, disconnect supervision, fx lines, etc. Might also ensure it can supply the needed 100 vac ringing voltage (historically referred to as a ring generator). Yes, I'm looking for a channel bank to interface analog phones and pstn lines to asterisk. I've got a simple test system setup with the TDM10B and X100p and want to continue learning asterisk with the T1 card. I've been reading the list archives and searching Ebay for channel banks. There are lots of Carrier Access Corp (CAC) Access Bank I and II's available but I don't explicitly see anything about calling party disconnect in the user manuals. The CAC Adit 600 manual, on the other hand, states that calling party disconnect is supported on the FXO interfaces. That's great, but I haven't seen any on Ebay and I can't justify the expense of a new unit. Acording to the list archives the Adtran 750/850 units work well but I haven't read the manuals for those units yet. Basically, I was hoping to purchase a functional, used, older channel bank for a few hundred dollars so that I could continue learning Asterisk and to also have a system to demonstrate to potential clients. Any suggestions welcome. -Lance ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] far end disconnect supervision
Lance, Yes, I'm looking for a channel bank to interface analog phones and pstn lines to asterisk. I've got a simple test system setup with the TDM10B and X100p and want to continue learning asterisk with the T1 card. I've been reading the list archives and searching Ebay for channel banks. There are lots of Carrier Access Corp (CAC) Access Bank I and II's available but I don't explicitly see anything about calling party disconnect in the user manuals. The CAC Adit 600 manual, on the other hand, states that calling party disconnect is supported on the FXO interfaces. That's great, but I haven't seen any on Ebay and I can't justify the expense of a new unit. Acording to the list archives the Adtran 750/850 units work well but I haven't read the manuals for those units yet. Basically, I was hoping to purchase a functional, used, older channel bank for a few hundred dollars so that I could continue learning Asterisk and to also have a system to demonstrate to potential clients. Any suggestions welcome. I've not implemented any form of channel bank with *, so can't offer much help on specific vendor/models. Since there are a fair number of folks using them on the list, try posting a new thread with channel bank in the subject, and summarize the responses in the wiki. Personal opinion is that throwing a channel bank at * (other then for better echo cancellation on trunks) is like taking a shower with your socks on; don't see any practical use. But, I'm sure some do. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] far end disconnect supervision
Am I missing something? Is there another way to pipe large quantities of analog lines (FXS or FXO) into *? Seriously, is there another way? Sean -Original Message- From: Rich Adamson [mailto:[EMAIL PROTECTED] Sent: Saturday, January 10, 2004 9:48 PM To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] far end disconnect supervision Lance, Yes, I'm looking for a channel bank to interface analog phones and pstn lines to asterisk. I've got a simple test system setup with the TDM10B and X100p and want to continue learning asterisk with the T1 card. I've been reading the list archives and searching Ebay for channel banks. There are lots of Carrier Access Corp (CAC) Access Bank I and II's available but I don't explicitly see anything about calling party disconnect in the user manuals. The CAC Adit 600 manual, on the other hand, states that calling party disconnect is supported on the FXO interfaces. That's great, but I haven't seen any on Ebay and I can't justify the expense of a new unit. Acording to the list archives the Adtran 750/850 units work well but I haven't read the manuals for those units yet. Basically, I was hoping to purchase a functional, used, older channel bank for a few hundred dollars so that I could continue learning Asterisk and to also have a system to demonstrate to potential clients. Any suggestions welcome. I've not implemented any form of channel bank with *, so can't offer much help on specific vendor/models. Since there are a fair number of folks using them on the list, try posting a new thread with channel bank in the subject, and summarize the responses in the wiki. Personal opinion is that throwing a channel bank at * (other then for better echo cancellation on trunks) is like taking a shower with your socks on; don't see any practical use. But, I'm sure some do. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] far end disconnect supervision
I found this supplier on ebay and they seem to have a regular supply of Adit 600s. I spent $800 for one with 8 fxo/8 fxs. This may be out of your price range, but I think it is a pretty good deal for this model. I really recommend the 600. It did amazing things to eleminate our echo problems. My experience so far with the ebay thing is you may wait a while to find something with all the features you want and with fxo cards and fxo cards are pricy when bought seperately/new. The way I finally got a unit was to use ebay to find vendors selling Adits and then contect them directly for the configuration I wanted. I made the wrong initial purchase and ended up with an AB1 (with broken ring generator to boot). They definetely do not support disconnect supervision. http://www.sunteldata.com/ -- Jonathan Moore Director of Technology Winfield Public Schools Office 620.221.5100 Fax 620.221.0508 Quoting Lance Arbuckle [EMAIL PROTECTED]: Rich Adamson wrote: I'm starting to shop for my first channel bank and one of the features that eveyone seems to recommend is far end disconnect supervision. What other terms do various manufactures use to describe this same feature ? Is calling party disconnect the same as far end disconnect supervision ? Yes, in most readers terms. However, in some cases marketing/sales people may have written stuff with no clue what they are talking about. Is far end disconnect supervision BOTH a service/feature/line signaling provided by the Telco AND a feature of some channel banks ? If some channel banks don't support this, how on earth do they know when the telco side of the call has hung up ? If you go way back in history, channel banks were only used by telcos and at least initially were only required to pass signaling between central office switches. It wasn't until fx cards were added that channel banks had to be concerned with calling and called party disconnects. In some states, the regulatory agencies governed what could (or could not) be deployed and under what conditions. Called party disconnect was frequently used by court order for police verification on certain calls, while calling party disconnect was the norm. At that time, customer lines were directly connected to the central office switch, and it was functions within the switch that controlled calling/called party disconnects. If the telco deployed a channel bank with fx-type customer interfaces, the channel bank would need to support calling and called party disconnect in order to inform the central office switch of call status. If the telco deployed a channel bank with interfaces to a customer's pbx where signaling used tones (as an example), the channel bank would not need the added electronics to support disconnect supervision. Disconnect supervision refers to opening/closing the 2-wire circuit (as in hanging up a telephone), and in some cases, reversing tip/ring (48 volt polarity change). (There are a number of other interfaces available for channel banks beside those designed for two-wire fx's.) Since there are lots of old (and new) channel banks being sold on ebay, etc, that may have been designed for different purposes, some will support disconnect supervision while others do not, some are two-wire while others are four-wire, some support E M signaling (extra wires per channel), some supply 100vac ringing voltage while others do not, some run on only 48 volt DC power while others are 110 vac power, etc. If you're looking for a channel bank to interface phones with asterisk, then keywords would include 2-wire, disconnect supervision, fx lines, etc. Might also ensure it can supply the needed 100 vac ringing voltage (historically referred to as a ring generator). Yes, I'm looking for a channel bank to interface analog phones and pstn lines to asterisk. I've got a simple test system setup with the TDM10B and X100p and want to continue learning asterisk with the T1 card. I've been reading the list archives and searching Ebay for channel banks. There are lots of Carrier Access Corp (CAC) Access Bank I and II's available but I don't explicitly see anything about calling party disconnect in the user manuals. The CAC Adit 600 manual, on the other hand, states that calling party disconnect is supported on the FXO interfaces. That's great, but I haven't seen any on Ebay and I can't justify the expense of a new unit. Acording to the list archives the Adtran 750/850 units work well but I haven't read the manuals for those units yet. Basically, I was hoping to purchase a functional, used, older channel bank for a few hundred dollars so that I could continue learning Asterisk and to also have a system to demonstrate to potential clients. Any suggestions welcome. -Lance ___
Re: [Asterisk-Users] far end disconnect supervision
Quoting Rich Adamson [EMAIL PROTECTED]: Personal opinion is that throwing a channel bank at * (other then for better echo cancellation on trunks) is like taking a shower with your socks on; don't see any practical use. But, I'm sure some do. This statement assumes a lot. 1. That you don't want to use analog phones. 2. That you need enough lines for a T1/PRI circuit. In this case the most economical way to deploy a setup of say 5-16 voice lines is with a channel bank and a T1 card in the * server. If there is some less expensive option please share :-). Visit Winfield Public Schools at http://usd465.com - This mail sent through IMP: http://horde.org/imp/ ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
