A small note on AAR

AAR (Automated Alternate Routing) only works on the cases when remote site phones still have SCCP connection with the CUCM at the central site, but the remote location do not have enough bandwidth to establish a call over the IP WAN. It can reroute the call using AAR (via PSTN or secondary IP path) ONLY for this particular case. I just learnt it today when I tried to reach my SRST site phones by AAR, but just failed. But I accepted it cordially. 🙂


About Mijanur Rahman
Mijanur started blogging to save and share his study and research notes. A deep diver in technologies and loves to participate in technical brainstorming. Proud father of two wonderful daughters loves to spend time with them. He writes about the topics that people deal with every day mainly on technology arena. To get in touch contact him at bilashece@gmail.com

2 Responses to A small note on AAR

  1. dreamforccie says:

    thanks! yes, that’s the only way out 🙂

  2. Roger says:

    To be able to call the phone when in SRST you can use the CFUR field. Set the CSS to the same as AAR and put the full E.164 number in the destination field.

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