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Inbound Calls during SRST Active

RAustin70
Level 1
Level 1

Have SRST set up at a remote site. In testing today, I simulated WAN Failure by blocking access the CUCM cluster subnets. Remote site phones all went "SRST Active" and 'show ccm-manager' showed MGCP Fallback enabled/ON.

Made test calls from remote site to Main site, calls successfully went out one of the 2 configured POTS lines and connected to the distant end successfully.

Tried to make calls from Main site back to the remote site with CFUR set up to dial one of the POTS, and the call will ring 2 or three times, then give dial-tone. The way I built it out, any call that comes into those POTS - on NIM-4FXO - and all calls coming into those lines PLAR to 3302503 and that line is line 2 on all 7800 series phones on the site.


This is the neat part. when the WAN is connected (NON-SRST) and you dial the POTS line, it does ring 3302503 on all phones, and can be answered and two way audio is fine. but in SRST Mode, I can watch the FXO port on the ISR4431 light up green when the call comes in, but it goes to dial tone. I feel like I am missing something ridiculously simple like this is a secondary dialtone and I need a direct-inward-dial or no second dialtone somewhere.

General Config:

!
version 16.9
!
hostname OA-NEWPORT-4431-1
!
!
stcapp ccm-group 1
stcapp
!
stcapp supplementary-services
port 0/2/0
fallback-dn 3307252
port 0/2/1
fallback-dn 3303922
port 0/2/2
fallback-dn 3303253
port 0/2/3
fallback-dn 3302996
port 0/3/0
fallback-dn 3300331
port 0/3/2
fallback-dn 3303959
port 0/3/3
fallback-dn 3303967
!
!
!
!
trunk group newport-pots
hunt-scheme round-robin
!
!
!
!
voice call send-alert
voice rtp send-recv
!
voice service voip
ip address trusted list
ipv4 137.243.0.0 255.255.0.0
ipv4 0.0.0.0 0.0.0.0
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to sip
fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback none
modem passthrough nse codec g711alaw
h323
sip
bind control source-interface GigabitEthernet0/0/1.892
bind media source-interface GigabitEthernet0/0/1.892
registrar server expires max 600 min 60
redirect contact order best-match
!
voice class codec 1
codec preference 1 g729r8
codec preference 2 g711ulaw
!
!
!
!
voice iec syslog
!
voice register global
default mode
no allow-hash-in-dn
system message SRST Active
max-dn 100
max-pool 100
!
voice register pool 1
id network 10.243.0.0 mask 255.255.0.0
application default
voice-class codec 1
!
!
voice-card 0/1
no watchdog
!
voice-card 0/2
no watchdog
!
voice-card 0/3
no watchdog
!
voice-card 0/4
dsp services dspfarm
no watchdog
!
interface Loopback0
description *** NETWORK-MANAGEMENT ***
ip address 137.243.9.253 255.255.255.255
!
interface Loopback1
no ip address
!
!
interface GigabitEthernet0/0/1.892
description Voice Routing
encapsulation dot1Q 892
ip address 172.17.92.193 255.255.255.192
!
interface GigabitEthernet0/0/2
description ROUTED LINK TO MICROWAVE
ip address 10.100.101.2 255.255.255.248
ip pim neighbor-filter MCAST_PIM_NEIGHBORS
ip pim sparse-mode
ip ospf message-digest-key 1 md5 7 0254134813050B241F0A3B3F3335353F49
ip ospf dead-interval 4
ip ospf hello-interval 1
ip ospf mtu-ignore
media-type rj45
speed 1000
no negotiation auto
no cdp enable
crypto map NEWPORT
service-policy output QOS_PM
!
!
!
voice-port 0/1/0
trunk-group newport-pots
timing hookflash-out 50
timing guard-out 1000
connection plar 3302503
description 3158458842
!
voice-port 0/1/1
trunk-group newport-pots
timing hookflash-out 50
timing guard-out 1000
connection plar 3302503
description 3158458844
!
voice-port 0/1/2
shutdown
!
voice-port 0/1/3
shutdown
!
voice-port 0/2/0
timeouts ringing infinity
station-id name Newport Fax Machine
station-id number 3307252
caller-id enable
!
voice-port 0/2/1
timeouts ringing infinity
!
voice-port 0/2/2
timeouts ringing infinity
!
voice-port 0/2/3
timeouts ringing infinity
!
voice-port 0/3/0
timeouts ringing infinity
!
voice-port 0/3/1
timeouts ringing infinity
station-id name Giant Voice
station-id number 1234
caller-id enable
!
voice-port 0/3/2
timeouts ringing infinity
station-id name Fire Alarm Auto Dial
!
voice-port 0/3/3
timeouts ringing infinity
!
mgcp
mgcp call-agent 137.243.250.10 2427 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode nte-gw
mgcp rtp unreachable timeout 1000 action notify
mgcp modem passthrough voip mode nse
mgcp codec clear-channel packetization-period 20
mgcp ip qos dscp cs6 signaling
mgcp playout adaptive 15 15 30
mgcp package-capability mf-package
mgcp package-capability rtp-package
mgcp package-capability sst-package
mgcp package-capability pre-package
mgcp package-capability mdste-package
mgcp package-capability srtp-package
no mgcp package-capability res-package
no mgcp package-capability fxr-package
no mgcp timer receive-rtcp
mgcp sdp simple
mgcp validate call-agent source-ipaddr
mgcp fax t38 ecm
mgcp fax t38 inhibit
mgcp rtp payload-type g726r16 static
mgcp bind control source-interface GigabitEthernet0/0/1.892
mgcp bind media source-interface GigabitEthernet0/0/1.892
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable
!
mgcp profile default
!
sccp local GigabitEthernet0/0/1.892
sccp ccm 137.243.250.10 identifier 2 version 7.0
sccp ccm 137.243.251.10 identifier 1 version 7.0
sccp ip precedence 6
sccp
!
sccp ccm group 1
bind interface GigabitEthernet0/0/1.892
associate ccm 1 priority 1
associate ccm 2 priority 2
associate profile 1 register NWPT-4431-1-CFB
signaling dscp cs6
!
ccm-manager music-on-hold
!
ccm-manager fallback-mgcp
ccm-manager redundant-host 137.243.251.10 137.243.250.5
ccm-manager mgcp
no ccm-manager fax protocol cisco
ccm-manager config server 137.243.250.5
ccm-manager sccp local GigabitEthernet0/0/1.892
!
dspfarm profile 1 conference
codec g729br8
codec g729r8
codec g729abr8
codec g729ar8
codec g711alaw
codec g711ulaw
maximum sessions 5
associate application SCCP
!
dial-peer voice 10 pots
trunkgroup newport-pots
description 10 local calls via POTS LINES
destination-pattern 99[2-9]..[2-9]......
forward-digits 10
!
dial-peer voice 13 pots
trunkgroup newport-pots
description 7 Digit Local via POTS Lines
destination-pattern 330[2-4]...
forward-digits 7
prefix 315
!
dial-peer voice 14 pots
trunkgroup newport-pots
description 7 Digit Local via POTS Lines
destination-pattern 3305[0-4]..
forward-digits 7
prefix 315
!
dial-peer voice 15 pots
trunkgroup newport-pots
description 7 Digit Local via POTS Lines
destination-pattern 3307...
forward-digits 7
prefix 315
!
dial-peer voice 16 pots
trunkgroup newport-pots
description 911 Emergency Calls via POTS Lines
destination-pattern 911
forward-digits 3
!
dial-peer voice 11 pots
trunkgroup newport-pots
description 11 long distance calls via POTS LINES
destination-pattern 981[2-9]..[2-9]......
forward-digits 11
!
dial-peer voice 100 voip
description 911 Call Back
destination-pattern 3302503
session protocol sipv2
session target ipv4:137.243.251.10
incoming called-number .
voice-class codec 1
dtmf-relay h245-alphanumeric
no vad
!
dial-peer voice 101 voip
description 911 Call Back
preference 1
destination-pattern 3302503
session protocol sipv2
session target ipv4:137.243.250.10
incoming called-number .
voice-class codec 1
dtmf-relay h245-alphanumeric
no vad
!
dial-peer voice 999010 pots
service mgcpapp
port 0/1/0
!
dial-peer voice 999011 pots
service mgcpapp
port 0/1/1
!
dial-peer voice 999012 pots
service mgcpapp
port 0/1/2
!
dial-peer voice 999013 pots
service mgcpapp
port 0/1/3
!
dial-peer voice 999020 pots
service stcapp
port 0/2/0
!
dial-peer voice 999021 pots
service stcapp
port 0/2/1
!
dial-peer voice 999022 pots
service stcapp
port 0/2/2
!
dial-peer voice 999023 pots
service stcapp
port 0/2/3
!
dial-peer voice 999030 pots
service stcapp
port 0/3/0
!
dial-peer voice 999031 pots
service stcapp
port 0/3/1
!
dial-peer voice 999032 pots
service stcapp
port 0/3/2
!
dial-peer voice 999033 pots
service stcapp
port 0/3/3
!
!
sip-ua
!
!
call-manager-fallback
transport-tcp-tls
max-conferences 8 gain -6
transfer-system full-consult
ip source-address 172.17.92.193 port 2000
max-ephones 100
max-dn 100
system message primary ****SRST MODE****
!
end

 

Any insight while I keep looking into this would be helpful.  On my next trip out there I will have to run some debugs and see what's going on in there.

 

1 Reply 1

RAustin70
Level 1
Level 1

One configuration on this system that may be a bit different is when the remote site device dials 911, it routes out those POTS lines using the remote site route group so it gets to the county dispatch, and the 911 callback dial peers are set up to ring 3302503.

 

So, is my solution to split those ports, one MGCP and one not and configure them?  We are looking at getting another 2 POTS lines in there but that will be 6 months from now.

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