Problem with VoIP Dial Peers / Destination Patterns

From: Cal Michael (cmichael@xxxxxxxxxxxxxxxx)
Date: Sun Jun 17 2001 - 15:28:48 GMT-3


   
- I have a conceptual question regarding
  dial peer / destination-patterns.

  If a install has the requirement here in
  Chi town that they want to hit a 9 to be
  routed offnet to Ameritech/SBC and be able
  to do either 7 or 11 digit dialing (1+10)
  how do you set the destination patterns?

  I can get a destination pattern of 9T to
  work fine, but if I want to get specific,
  say because the Ameritech switch only will
  accept 10 digits or more so I would need
  to prepend - prefix the local area code to
  7 digit calls, a 9T would not work for this
  and would seem to interfere with a exact
  dial peer / destination pattern match for
  911, though I don't dare test that.

  I was thinking that I would need four dial
  peer w/ destination pattern aimed at the
  correct FXO ports, but when I do this, the
  result just doesn't work right.

--- Example ---

  The first dial peer / destination pattern
  is for 7 digits dialing. It should strip
  the 9 by default. It prepends the local
  area code to send to the switch.

  dial-peer voice 9 pots
  destination-pattern 9.......
  prefix 847
  port 1/1/1

  The second dial peer / destination pattern
  is for 11 digits dialing. It should strip
  the 9 and 1 by default sending the remain
  10 digits to Ameritech/SBC's switch.

  dial-peer voice 91 pots
  destination-pattern 91..........
  port 1/1/1

  The third dial peer / destination pattern
  is for international dialing, or calling
  codes. It should strip the 9 by default
  sending the remaining digits to the switch
  after 10 seconds of not hearing digits.

  dial-peer voice 90 pots
  destination-pattern 9T
  port 1/1/1

  The fourth dial peer / destination pattern
  is for 911. No digits should be stripped
  as no wild cards are used. 911 should be
  sent to the switch, but on a different
  port.

  dial-peer voice 911 pots
  destination-pattern 911
  port 1/1/0

  Testing by calling 918005551212 results in
  a call being placed for 1800555 as if it
  matched dial-peer 1 as the best match.
  Ameritech/SBC has pleasant messages for the
  result. . .

  When I do a show dialplan number <E164>,
  both dial-peers 1,2,3 show as if it they
  can match.

  If I do the same show dialplan against 911,
  the results are that all four are valid.

  Where am I going wrong?

--- Thanks ---

::::::::::::::::::::::::::::::::::::::::::::::
  Cal Michael - Senior Networking Consultant
  CCIE R-S/ISP Dial, CCDP 847-385-6700 Voice
  Network Data Systems 888-286-7350 Pager
       mailto:cmichael@network-data.com
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