I have a customer that wants to integrate (9) Cisco wireless phones (i.e. 7921s) to their existing Nortel Meridian option 61C platform. I know I need to integrate a UCME voice gateway (i.e. 2801) to register the Cisco IP Phones and I'm completly fine with the telephony and wireless portion. I'm hung up on the "tie-line" to the Nortel PBX. Could this be done with analog ports (FXO / FXS), or should I use Q.SIG with a TI PRI interface. I've seen a lot of E1 Q.SIG posts, but since this is in the US, and I'm sure the Nortel's PRI interface is T1 based, I figure I have to stick with the T1 interface. Any success stories on similar integrations; what limitations / road blocks may I encounter ?? 80% of phone traffic from WiFi phones will be to Nortel house phones, while 20% will be off-net to PSTN.