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Unable to receive direct incoming calls when in SRST mode

alfiesummers
Level 1
Level 1

Hi there - I have an issue relating to my 2851 when in SRST mode. I am able to make outgoing calls with no issues. However if I dial a number at the site I am presented with a dial tone and not a phone ringing. During this dial tone if I dial the 4 digit extension the SRST phone at the site rings.

I'm grateful for any suggestions. Config and debug isdn Q931 below.

Note all works OK when the gateway can see the CUCM server.

=========================================

VG04_2851_LAB#sh run

Building configuration...

Current configuration : 2347 bytes

!

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname VG04_2851_LAB

!

boot-start-marker

boot-end-marker

!

card type e1 0 0

logging buffered 4096 informational

logging console informational

logging monitor informational

!

no aaa new-model

!

resource policy

!

network-clock-participate wic 0

network-clock-select 1 E1 0/0/0

ip subnet-zero

!

!

ip cef

!

!

ip host CUCM6-Publisher 10.60.5.10

isdn switch-type primary-net5

!

voice-card 0

no dspfarm

!

!

voice call send-alert

voice rtp send-recv

!

!

!

!

!

!

!

!

!

!

!

application

global

service alternate Default

!

!

!

!

username <removed for privacy>

!

!

controller E1 0/0/0

pri-group timeslots 1-31 service mgcp

!

!

!

interface GigabitEthernet0/0

ip address 10.60.5.23 255.255.255.0

duplex auto

speed auto

!

interface GigabitEthernet0/1

no ip address

shutdown

duplex auto

speed auto

!

interface Serial0/0/0:15

no ip address

isdn switch-type primary-net5

isdn incoming-voice voice

no cdp enable

!

ip classless

ip route 0.0.0.0 0.0.0.0 10.60.5.1

!

!

ip http server

no ip http secure-server

!

!

!

!

control-plane

!

!

!

voice-port 0/0/0:15

!

ccm-manager fallback-mgcp

ccm-manager mgcp

ccm-manager music-on-hold

ccm-manager config server 10.60.5.10

ccm-manager config

!

mgcp

mgcp call-agent CUCM6-Publisher 2427 service-type mgcp version 0.1

mgcp dtmf-relay voip codec all mode out-of-band

mgcp rtp unreachable timeout 1000 action notify

mgcp modem passthrough voip mode nse

mgcp package-capability rtp-package

no mgcp package-capability res-package

mgcp package-capability sst-package

no mgcp package-capability fxr-package

mgcp package-capability pre-package

no mgcp timer receive-rtcp

mgcp sdp simple

mgcp rtp payload-type g726r16 static

!

mgcp profile default

!

!

!

dial-peer voice 1 pots

destination-pattern 9T

port 0/0/0:15

!

dial-peer voice 2 pots

destination-pattern 02032061...

incoming called-number .

direct-inward-dial

!

!

!

call-manager-fallback

max-conferences 8 gain -6

limit-dn 7960 2

ip source-address 10.60.5.23 port 2000 strict-match

max-ephones 3

max-dn 6 dual-line

dialplan-pattern 1 02032061... extension-length 4 extension-pattern 1...

keepalive 20

!

!

line con 0

login local

line aux 0

line vty 0 4

login local

!

scheduler allocate 20000 1000

!

end

VG04_2851_LAB#

=========================================

incoming debug ISDN Q931

*Sep 11 13:04:22.231: %ISDN-6-CONNECT: Interface Serial0/0/0:0 is now connected

to N/A N/A

*Sep 11 13:04:30.067: %ISDN-6-DISCONNECT: Interface Serial0/0/0:0 disconnected

from unknown , call lasted 7 seconds

=========================================

Outgoing debug ISDN Q931

*Sep 11 13:05:45.635: %ISDN-6-CONNECT: Interface Serial0/0/0:30 is now connected

to <removed for privacy>118 N/A

*Sep 11 13:05:48.307: %ISDN-6-DISCONNECT: Interface Serial0/0/0:30 disconnected

from <removed for privacy>118 , call lasted 2 seconds

=========================================

Thanks again for your help.

Best Regards,

Alfie

18 Replies 18

Hi all - Still not working I am afraid. Same issue when I amend the dial peers I can call out but get an unobtainable when dialing in! As soon as I restore the link to CUCM I am able to dial in so must be a local dial-peer issue.

CUCM is configured with significant digits of 4 if this helps in relation to incoming calls.

have u got translation rules on your voice port 0/0/1:15, or whatever that port number is??

u might need to configure the tranlation rules to translate from the full number to the 4 digit number. then apply that rule under the voice port, probably not under dial peer...

I would recommend that you use voice translation rules for digit manipultaion and remove the dialplan-pattern command from your SRST configuration, as this has an affect on both outbound and inbound calls.

Hello and thanks to all. I finally cracked this. The telco confirmed they are presenting 6 digits. This equated to 0617XX hitting the gateway, internally we use 17XX.

As such I added the following command for translation with these dial peers.

num-exp 0617.. 17.. in global conf mode.

dial-peer voice 2 pots

destination-pattern 9T

port 0/0/0:15

!

dial-peer voice 1 pots

incoming called-number .

direct-inward-dial

port 0/0/0:15

All works A-OK now.