遠傳 E1 Trunk 連接方式

遠傳的 E1 因為預設的 CRC 檢查是關閉的, 但又好巧不巧的 Elastix 預設是打開的, 所以就必須關閉這個檢查碼才可以連接...

關閉方式

cp /etc/dahdi/system.conf /etc/dahdi/system.conf.bak

vim /etc/dahdi/system.conf
 
 原始檔如下
==============================================================
# Autogenerated by /usr/sbin/dahdi_genconf on Mon May  7 13:16:24 2012
# If you edit this file and execute /usr/sbin/dahdi_genconf again,
# your manual changes will be LOST.
# Dahdi Configuration File
#
# This file is parsed by the Dahdi Configurator, dahdi_cfg
#
# Span 1: TE2/0/1 "T2XXP (PCI) Card 0 Span 1" (MASTER)
span=1,1,0,ccs,hdb3,crc4
# termtype: te
bchan=1-15,17-31
dchan=16
echocanceller=oslec,1-15,17-31

# Span 2: TE2/0/2 "T2XXP (PCI) Card 0 Span 2"
span=2,2,0,ccs,hdb3,crc4
# termtype: te
bchan=32-46,48-62
dchan=47
echocanceller=oslec,32-46,48-62

# Global data

loadzone        = us
defaultzone     = us
 ==============================================================

修改成
 ==============================================================
 # Autogenerated by /usr/sbin/dahdi_genconf on Mon May  7 13:16:24 2012
# If you edit this file and execute /usr/sbin/dahdi_genconf again,
# your manual changes will be LOST.
# Dahdi Configuration File
#
# This file is parsed by the Dahdi Configurator, dahdi_cfg
#
# Span 1: TE2/0/1 "T2XXP (PCI) Card 0 Span 1" (MASTER)
span=1,1,0,ccs,hdb3
# termtype: te
bchan=1-15,17-31
dchan=16
echocanceller=oslec,1-15,17-31

# Span 2: TE2/0/2 "T2XXP (PCI) Card 0 Span 2"
span=2,2,0,ccs,hdb3
# termtype: te
bchan=32-46,48-62
dchan=47
echocanceller=oslec,32-46,48-62

# Global data

loadzone        = us
defaultzone     = us
 ==============================================================