Asterisk box does not answer incoming PSTN call

Hello everyone.
I am looking for assistance.

Here is what I have.
Asterisk 1.4.8 loaded and running.
I also requested sample conf files at the time of the install.

Using wctdm24xxp with 1 FXO module installed.
I have a requirement of needing only 4 analog lines coming
from my local telco.

I have zero FXS modules installed.

I will not be using any analog phones. I am using grandstream IP phones
for all extensions. Hence, no FXS, module(s)



ztcfg -vv yields the following:

Channel map:
Channel 01 : fxs Kewlstart (default) (slaves: 01)
Channel 02 : fxs Kewlstart (default) (slaves: 02)
Channel 03 : fxs Kewlstart (default) (slaves: 03)
Channel 04 : fxs Kewlstart (default) (slaves: 04)

4 channels configured


channel= 1-4

Please note: I have not identified any FXS devices. I am not using analog phones in this system, only IP phones.



I have the first tip/ring pair coming directly from my local telephone tied to pin 1 and 26 (channel 1) OF MY wctdm24xxp card.

When I call the local telephone company number tied to my Asterisk box all I want to happen at this time is that the Asterisk box answer the call and hang up. Asterisk never answers the call. I have opened the connection at the asterisk box and can short the pair back towards the local telco and answer the call.

I am not using Asterisk now at this point. I have had problems with Asterisk now Beta 5 so I thougth I’d try the command line version.

With command line interface I am not sure where to enter service providers and incoming calling rules. I am thinking that without this information the call will not be answered. Someone told me that asterisk now is not reliable. This is why I am using command line 1.4.8 version of Asterisk. I am not sure the teller of this tale was accurate. Is Asterisk Now beta 6 ok to use? Any help with this lack of Asterisk not answering an incoming call would be most appreciated. I’ll build the extensions next.


What does zap show channels show you?
What does zttool say about the card
what do you see on the CLI when a call comes in?

and finaly are you sure that the ports configured are the ones that the module is installed in


Hello Ian,
Thanks for the quick response.

zttool tells me:

Alarms Span
OK wildcard tdm2400P rev e/f board 1

The FXO module is plugged into slot 1.

I see no messages of any kind at the CLI.
I have input the following:
set debug 10
set verbose 10

However, I am not sure the commands were honored.
I am up on Linux Fedora 7.
Possibly I should be Red hat??
I need to verify zap show channels. Not 100 % sure on this one.
Thanks again

So far so good

what does zttool show when you select the tdm2400 ?

as to “zap show channels” just enter it at the * cli and it will respond back with what the channels are configured as.


Thanks Ian,
I will return here with the zap show channels information as soon as possible.
I will also provide additional stats on tdm2400 VIA zttool.
Thanks for your help…

Hello Ian

Zap show Channel follows:

Chan Extension Context Language MOH Interpret
pseudo incoming default
1 incoming default
2 incoming default
3 incoming default
4 incoming default

ocalhostCLI> zap show channel 1
Channel: 1CLI>
File Descriptor: 16
Span: 1
Extension: LI>
Dialing: no
Context: incoming
Caller ID:
Calling TON: 0
Caller ID name:
Destroy: 0
InAlarm: 0
Signalling Type: FXS Kewlstart
Radio: 0t
Confno: -1CLI>
Propagated Conference: -1
Real in conference: 0
DSP: no
Relax DTMF: no
Dialing/CallwaitCAS: 0/0
Default law: ulaw
Fax Handled: no
Pulse phone: no
Echo Cancellation: 128 taps, currently OFF
Actual Confinfo: Num/0, Mode/0x0000
Actual Confmute: No
Hookstate (FXS only): Onhook

Any assistance would be appreciated…

Also channels 2,3 and 4 look the same…


Set the dialplan to


So at least somthing has to happen.

Then connect to the * cli, set debug to 99 and verbose to 99 and fire a call in.


Hello Ian,
Finally getting back to the problem. I added the lines of code to extensions.conf and got the required answer. I also sent an extensions reload command from the CLI just prior to the box answering the call. I found the note on the reload command in the verbose within extensions.conf file.
Thanks for your assistance with this. It made my job much easier.
FYI… I am adding 16 extensions to this system. All are Grandstream IP phones. I have added 2 of the 16 and they came up after building the SIP.conf files. It looks like command reload needs to executed after any changes to the sip.conf file. It that the way you see it?? Also it appears that command reload needs to be executed after any changes to zapata.conf.zapscan. I believe this is an excellent system after tearing out what is left of my original hair. Seriously though… Asterisk will serve our customer well.
Thanks again, If I see you in the field sometime. I’ll buy coffee.