Cisco e1

Пример конфига

no aaa new-model
clock timezone MSK 4
tdm clock E1 0/0 both export line
voice-card 0
!
isdn switch-type primary-net5
!
!
voice translation-rule 1
rule 1 /74872711101/ /\0/
rule 2 reject /^.*$/
!
voice translation-rule 2
rule 1 reject /^0+/
rule 2 /^[1-9]/ /\0/
!
voice translation-profile KILL-LEFT-CALLS
translate calling 1
translate called 2
!
!
controller E1 0/0
framing NO-CRC4 
pri-group timeslots 1-31
!
interface Serial0/0:15
no ip address
encapsulation hdlc
no logging event link-status
isdn switch-type primary-net5
isdn not-end-to-end 64
isdn protocol-emulate network
isdn incoming-voice voice
isdn send-alerting
isdn sending-complete
no cdp enable
!
voice-port 0/0:15
disc_pi_off
output attenuation -6
echo-cancel coverage 32
no vad
no comfort-noise
cptone RU
timeouts call-disconnect 0
timeouts ringing infinity
!
dial-peer voice 711101 pots
tone ringback alert-no-PI
answer-address ^74872711101$
destination-pattern ^74872711101$
progress_ind setup enable 3
progress_ind progress enable 8
progress_ind connect enable 8
direct-inward-dial
port 0/0:15
forward-digits all

Описание основных настроек

Секция: controller E1 x/x

framing NO-CRC4 (framing CRC4) - вкл/выкл crc4, должно быть одинаково с обоих сторон, лучше когда вкл.
pri-group timeslots 1-31 можно выставить любой диапазон, B-канал* должен совпадать на обеих сторонах

Секция: interface Serialx/x:15

isdn protocol-emulate network (user) - синхронизация по B-каналу, network - ведущий, user - ведомый

Проверки

show controller e1

Выхлоп следующий:

E1 0/0 is up.
 Applique type is Channelized E1 - balanced
 No alarms detected.
 alarm-trigger is not set
 Version info Firmware: 20070320, FPGA: 20, spm_count = 0
 Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.
 CRC Threshold is 320. Reported from firmware  is 320.
 Data in current interval (176 seconds elapsed):
    0 Line Code Violations, 0 Path Code Violations
    176 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
    176 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
 Total Data (last 24 hours)
    292 Line Code Violations, 60 Path Code Violations,
    86400 Slip Secs, 0 Fr Loss Secs, 20 Line Err Secs, 0 Degraded Mins,
    86396 Errored Secs, 0 Bursty Err Secs, 4 Severely Err Secs, 0 Unavail Secs

если всё ок, то будет:

E1 0/0 is up.
No alarms detected

в противном случае будут ошибки, от которых стоит отталкиваться.