====== Gateway Class of Service ======
===== General =====
  * Apply only when we have both an incoming and outgoing COR list
  * If there is only one, then all calls are allowed.
  * Use in CCME and SRST
{{gw-cos1.png|}}\\
{{gw-cos2.png|}}

===== Configuration =====

==== COR Custom ====
  * Define tags for each type of call that you want to distinguish.
  * Like creating partitions.
<code>
dial-peer cor custom
  name Emergency
  name VMail
  name Local
  name LD
  name Intl
</code>

==== COR List lock ====
  * Assign "basic" outgoing corlists (equivalent to partitions), containing a single member tag, to the respective POTS dial peers that route each type of call.
  * Like creating locks
<code>
dial-peer cor list EmPt
  member Emergency
dial-peer cor list VMailPt
  member VMail
dial-peer cor list LocalPt
  member Local
dial-peer cor list LDPt
  member LD
dial-peer cor list IntlPt
  member Intl
</code>

==== COR List Keys ====
  * Assign "complex" incoming corlists (equivalent to calling search spaces), containing subsets of the member tags, to the IP phones that belong to the various classes of service.
  * Like creating keys
<code>
dial-peer cor list InternalCSS
  member Emergency
  member VMail
dial-peer cor list LocalCSS
  member Emergency
  member VMail
  member Local
dial-peer cor list LDCSS
  member Emergency
  member VMail
  member Local
  member LD
dial-peer cor list IntlCSS
  member Emergency
  member VMail
  member Local
  member LD
  member Intl
</code>

==== COR List Dial Peer ====
  * Using the command corlist outgoing corlist-name, configure the basic “partition” corlists as outgoing corlists assigned to the corresponding POTS dial peers:
  * Like assigning locks to destination or dial-peer
<code>
dial-peer voice 100 pots
  corlist outgoing EmPt
  destination-pattern 911
  no digit-strip
  direct-inward-dial
  port 1/0:23

dial-peer voice 101 pots
  corlist outgoing VMailPt
  destination-pattern 914085551234
  forward-digits 11
  direct-inward-dial
  port 1/0:23

dial-peer voice 102 pots
  corlist outgoing LocalPt
  destination-pattern 9[2-9]......
  forward-digits 7
  direct-inward-dial
  port 1/0:23

dial-peer voice 103 pots
  corlist outgoing LDPt
  destination-pattern 91[2-9]..[2-9]......
  forward-digits 11
  direct-inward-dial
  port 1/0:23

dial-peer voice 104 pots
  corlist outgoing IntlPt
  destination-pattern 9011T
  prefix-digits 011
  direct-inward-dial
  port 1/0:23
</code>

==== COR EPhone DN ====
  * Using the command corlist outgoing corlist-name, configure the basic “CSS” corlists as incoming corlists assigned to the IP Phones:
  * Like assigning keys
<code>
ephone dn 2001
  corlist incoming InternalCSS
ephone dn 2002
  corlist incoming IntlCSS
</code> 

==== COR Voice Register Pool ====
  * Using the command cor outgoing corlist-name, configure the basic “CSS” corlists as incoming corlists assigned to the IP Phones:
<code>
voice register pool 3001
  cor incoming InternalCSS default
voice register pool 3002
  cor incoming IntlCSS default
</code>

===== Debug =====
  * Show cor list with members
<code>
Router# show dial-peer cor
</code>