What you have is E1 port that can be use to connect to the PSTN or PABX which has E1 port also. You can configure that E1 port as E1 R2. Aside from configuring the E1 port, you need also to know how to configure VoIP using E1 so that you can use your router as your voice gateway.
Aside from your 3640, what other Cisco component do you have? Do you have MCS, IP Phone and other voice gateways? At this point, I'm still not sure the system that you are going to implement. If possible, can you described the system that you are going to implement. From there, I can give you some possible configurations in your 3640 router.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...