I have a SRST gateway (mode SRST) running IOS code 15.0(1)M3 which corresponds to SRST 7.1. When the gateway falls into SRST mode, I noticed that when I call the shared line i.e. 2300, only 1 of the 4 phones (which has shared line) rings.
The shared line behaves correctly in normal mode (when phones are registered to CUCM).
in SRST mode, all the phones register to SRST gateway.
I am wondering if Shared lines are supported when using 9971 and 7965 phones (SIP) in SRST 7.1 ? The SRST roadmap document is ambiguous.
You can refer the link for shared lines which says Shared line is supported with SIP in E-SRST mode.
Also, there are tables 9,10 and 11 which says what all features are supported ..
In your SRST configuration do you have your "max-dn" command including either dual or octo lines? If you configure "max-dn XX dual" you should be able to receive 2 calls on the shared line. If you configure "max-dn XX octo" you should be able to receive 8. XX = number of DNs allowed to register in SRST.
Are you sure all phones are setup as SIP? Shared lines don't work the same if you are sharing a line between sccp and sip phones in SRST mode. I don't think they work at all between the 2 on version 7.1 SRST.
If both phones are sip, do a "show voice register pool" while in SRST mode. Check to see if the same voice register dn is assigned to the phones. There is a small chance the voice gateway is creating multiple voice register dns for the same extension number.
E-SRST is an application installed on a SRE module to enhance SRST functionality. I wouldn't get too hung up on it.