установил trixbox настроил внутренние sip (звонят друг на друга нормально)
воткнута плата x100p, что в веб интерфейсе выбрать для прописки платы fxo и префиксов выхода в город?

Протестируйте в командной строке астериска - распозналась ли? Встала хорошо?
CLI>dahdi show channels

trix*CLI> dahdi show channels
No such command 'dahdi show channels' (type 'help dahdi show' for other possible commands)
trix*CLI> zaptel show channels
No such command 'zaptel show channels' (type 'help zaptel show' for other possible commands)
trix*CLI>

# lspci
00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 03)
00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 03)
00:07.0 ISA bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 02)
00:0c.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 06)
00:0d.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 6c)
00:0e.0 Communication controller: Motorola Wildcard X100P
00:0f.0 VGA compatible controller: ATI Technologies Inc 3D Rage II+ 215GTB [Mach64 GTB] (rev 9a)

#service dahdi start

>module load chan_dahdi.so

У вас нет канала DAHDI
Если в системе есть Communication controller: Motorola Wildcard X100P
это не значит, что появился канал DAHDI.
Остановите amportal stop
и сделайте команду pstn-setup. Теперь amportal start

Допустим всё хорошо, и она стала видна как канал №1
Не забудьте перекинуть контекст канала в context = from-zaptel
CLI> dahdi reload

В интерфейсе freePBX есть модуль ZAP channels DIDs. (Исторически осталось просто старое название ZAP) Добавьте номер канала как он виден в системе, скорее всего 1, описание - myFXO какой нить, и номер городской линии, которую втыкаете в порт FXO. В модуле Trunks добавить наш ZAP/1

Теперь можно входящие звонки принимать через модуль Inbound routes по этому номеру DID

service dahdi start
dahdi: unrecognized service
[trix.wwwarmavir.tv fax]# service
Usage: service < option > | --status-all | [ service_name [ command | --full-restart ] ]
[trix.wwwarmavir.tv fax]# module load chan_dahdi.so
-bash: module: command not found
[trix.wwwarmavir.tv fax]# amportal stop



STOPPING ASTERISK
Asterisk Stopped

STOPPING FOP SERVER
FOP Server Stopped
[trix.wwwarmavir.tv fax]# pstn-setup
-bash: pstn-setup: command not found

>module load chan_dahdi.so

нужно запускать из CLI.

сделайте yum remove dahdi
потом yum install dahdi

если не поможет, то компилить руками.

yum remove dahdi
Loaded plugins: fastestmirror
Setting up Remove Process
No Match for argument: dahdi
No Packages marked for removal
[trix.wwwarmavir.tv fax]# yum install dahdi
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* addons: mirrors.163.com
* extras: mirrors.163.com
* updates: mirror.yandex.ru
* base: mirrors.163.com
addons | 951 B 00:00
trixbox | 1.1 kB 00:00
extras | 2.1 kB 00:00
trixboxaddons | 951 B 00:00
updates | 1.9 kB 00:00
base | 2.1 kB 00:00
Excluding Packages from CentOS-5 - Addons
Finished
Excluding Packages from CentOS-5 - Extras
Finished
Excluding Packages from CentOS-5 - Updates
Finished
Excluding Packages from CentOS-5 - Base
Finished
Setting up Install Process
Parsing package install arguments
No package dahdi available.
Nothing to do
[trix.wwwarmavir.tv fax]# asterisk
Asterisk already running on /var/run/asterisk/asterisk.ctl. Use 'asterisk -r' to connect.
[trix.wwwarmavir.tv fax]# asterisk -r
Asterisk 1.4.22-4 RPM by vc-rpms@voipconsulting.nl, Copyright (C) 1999 - 2008 Digium, Inc. and others.
Created by Mark Spencer <markster@digium.com>
Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.
This is free software, with components licensed under the GNU General Public
License version 2 and other licenses; you are welcome to redistribute it under
certain conditions. Type 'core show license' for details.
=========================================================================
Connected to Asterisk 1.4.22-4 RPM by vc-rpms@voipconsulting.nl currently running on trix (pid = 7309)
trix*CLI>
[trix.wwwarmavir.tv fax]# service dahdi start
dahdi: unrecognized service
[trix.wwwarmavir.tv fax]# service dahdi
dahdi: unrecognized service
[trix.wwwarmavir.tv fax]# asterisk -r
Asterisk 1.4.22-4 RPM by vc-rpms@voipconsulting.nl, Copyright (C) 1999 - 2008 Digium, Inc. and others.
Created by Mark Spencer <markster@digium.com>
Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.
This is free software, with components licensed under the GNU General Public
License version 2 and other licenses; you are welcome to redistribute it under
certain conditions. Type 'core show license' for details.
=========================================================================
Connected to Asterisk 1.4.22-4 RPM by vc-rpms@voipconsulting.nl currently running on trix (pid = 7309)
trix*CLI> module load chan_dahdi.so
trix*CLI> dahdi show channels
No such command 'dahdi show channels' (type 'help dahdi show' for other possible commands)
trix*CLI>

Уже в платный суппорт.
Понимания нет и не намечается, копипаста и тупое исполнение команд.
В Asterisk 1.4.22 нет dahdi, там zap.