Hi, I'm getting "recovery on timer expiry" errors on outgoing calls from an AS5300 running 12.2(6h) IOS on a NET-5 PRI ISDN line. The calls are destined to mobile phones. A look at the "debug isdn q931" output reveals that the error is always generated exactly 60 seconds after the CALL_PROC. A look at "show isdn timers" reveals that *none* of the ISDN layer 2 or layer 3 timers is set to 60 seconds. The only timers that can actualy be changed (as far as I can see) are T310 and T306, the only relevant timer in this situation is T310. I've tried setting it to 120 seconds (it was set to 40 seconds), but the recovery on timer expiry still appears exactly 60 seconds after the CALL_PROC. I'm trying to find out which Q.931 timer is by default or by standard set to 60 seconds to be able to further debug this. The only relevant page on [URL="http://www.cisco.com"]www.cisco.com[/URL] that I was able to find did not really help me in this situation (as I said, changing T310 does not help and I already have "isdn sending-complete" configured): [URL]http://www.cisco.com/en/US/tech/tk652/tk701/technologies_tech_note09186a0080[/URL] 094487.shtml Here's what my "show isdn timers" has to say: ISDN Serial2:15 Timers (dsl 2) Switchtype = primary-net5 ISDN Layer 2 values K = 7 outstanding I-frames N200 = 3 max number of retransmits T200 = 1.000 seconds T202 = 2.000 seconds T203 = 10.000 seconds ISDN Layer 3 values T303 = 4.000 seconds T304 = 30.000 seconds T305 = 30.000 seconds T306 = 30.000 seconds T307 = 180.000 seconds T308 = 4.000 seconds T309 Disabled T310 = 40.000 seconds T313 = 4.000 seconds T316 = 120.000 seconds T318 = 4.000 seconds T319 = 4.000 seconds T322 = 4.000 seconds T3OOS = 5.000 seconds TGUARD= 8.000 seconds, Expiry = REJECT_CALL Thank in advance for any help you can offer.