HFC-USB & DECT Telefon Echo und Knacken

Misdn General-Config:
 -> Version: chan_misdn-0.3.0-rc25
 -> misdn_init: /etc/misdn-init.conf -> debug: 0
 -> tracefile: /var/log/misdn.trace  -> bridging: no
 -> stop_tone_after_first_digit: yes -> append_digits2exten: yes
 -> dynamic_crypt: no                -> crypt_prefix: **
 -> crypt_keys: test,muh

[PORT 1]
 -> name: default                    -> rxgain: 0
 -> txgain: 0                        -> te_choose_channel: no
 -> pmp_l1_check: yes                -> context: misdn
 -> language: en                     -> musicclass: default
 -> callerid:                        -> method: standard
 -> dialplan: 0                      -> localdialplan: 0
 -> cpndialplan: 0                   -> nationalprefix: 0
 -> internationalprefix: 00          -> presentation: -1
 -> screen: -1                       -> always_immediate: no
 -> immediate: no                    -> senddtmf: yes
 -> hold_allowed: no                 -> early_bconnect: yes
 -> incoming_early_audio: no         -> echocancel: 0
 -> echocancelwhenbridged: no        -> echotraining: 0
 -> need_more_infos: no              -> jitterbuffer: 4000
 -> jitterbuffer_upper_threshold: 0  -> callgroup:
 -> pickupgroup:                     -> msns: none
 -> ptp: no