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New Member

SRST and PRI

I'm setting up a new PRI and it's working great until I switch into SRST. I can receive one call in and the second one rings busy. I am also unable to call out.

Here's part of my config. Any help would be appreciated.

voice-port 0/1/0:23

connection plar 1350

!

dial-peer voice 999010 pots

service mgcpapp

port 0/1/0:23

!

dial-peer voice 30 pots

service mgcpapp

port 0/1/0:23

!

dial-peer voice 301 pots

service default

destination-pattern 9...[2-9]......

progress_ind alert enable 8

progress_ind progress enable 8

progress_ind connect enable 8

port 0/1/0:23

forward-digits 7

!

dial-peer voice 302 pots

service default

destination-pattern 91[2-9].........

progress_ind alert enable 8

progress_ind progress enable 8

progress_ind connect enable 8

port 0/1/0:23

forward-digits 11

!

!

!

!

call-manager-fallback

max-conferences 4 gain -6

timeouts interdigit 4

ip source-address 10.129.36.1 port 2000

max-ephones 30

max-dn 150

default-destination 1350

alias 1 1350 to 1351 preference 1

alias 2 1350 to 1352 preference 2

date-format dd-mm-yy

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

Re: SRST and PRI

try the following:

call-manager-fallback

alias 1 1350 to 1350 preference 1 cfw 1351 timeout 10

max-dn 150 dual-line preference 2

Remove the other alias commands and replace the max-dn command. This should properly set the call forward no answer and call forward busy settings for 1350 to send additional calls to 1351. If you don't want the call-waiting enabled, leave out the "dual-line" keyword.

12 REPLIES
Hall of Fame Super Gold

Re: SRST and PRI

debug isdn q931 would help in this (and many others) case.

Hall of Fame Super Silver

Re: SRST and PRI

Do you have the following configured:

application

global

service alternate default

Does the PRI fallback into SRST, if you run:

sh call-manager-fallback

and

sh isdn status

what does it show?

Chris

New Member

Re: SRST and PRI

I do have the application, global, service alternate default.

I'll try the show commands and see what I can find.

New Member

Re: SRST and PRI

The problem is relating to the "connection plar 1350" on the voice-port. This is sending all calls directly to the phone with extension 1350. Once a call is connected, the phone is busy, and all further incoming calls will ring busy.

A possible solution would be to enable "dual-line" (or call waiting). This would allow two calls to come in.

If you have DID's on this PRI, then the best option would be to configure the gateway to properly route directly to the DN's instead of sending everything to 1350.

New Member

Re: SRST and PRI

I'm not using DID's on this PRI. I thought using the alias command would allow another call in?

New Member

Re: SRST and PRI

The alias command will not allow a second call to come in. You can enable dual-line by changing "max-dn 150" to "max-dn 150 dual-line". This will turn on call waiting on the phone lines.

New Member

Re: SRST and PRI

Is it possible to get calls to a second phone then?

New Member

Re: SRST and PRI

try the following:

call-manager-fallback

alias 1 1350 to 1350 preference 1 cfw 1351 timeout 10

max-dn 150 dual-line preference 2

Remove the other alias commands and replace the max-dn command. This should properly set the call forward no answer and call forward busy settings for 1350 to send additional calls to 1351. If you don't want the call-waiting enabled, leave out the "dual-line" keyword.

New Member

Re: SRST and PRI

Thanks Dennis I'll give it a shot.

New Member

Re: SRST and PRI

Dennis this worked perfectly thank you.

New Member

Re: SRST and PRI

My pleasure.

New Member

Re: SRST and PRI

I am going to post my config as well. I have the exact same issue as jobegates but a little different config. Any other ideas? Thx,

dial-peer voice 999022 pots

application mgcpapp

port 0/2/2

!

dial-peer voice 999023 pots

application mgcpapp

port 0/2/3

!

dial-peer voice 1 pots

description SRST Primary Dial Peer

application default

destination-pattern 9T

incoming called-number .

direct-inward-dial

port 0/0/0:23

!

dial-peer voice 999020 pots

application mgcpapp

port 0/2/0

!

dial-peer voice 999021 pots

application mgcpapp

port 0/2/1

!

!

!

call-manager-fallback

secondary-dialtone 9

max-conferences 8

ip source-address 10.193.255.218 port 2000

max-ephones 76

max-dn 190 dual-line

dialplan-pattern 1 63069388.. extension-length 4

translate called 10

moh 211616.wav

multicast moh 239.1.1.1 port 16384 route 10.193.218.1 10.193.255.218

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