Tips About Access Codes; Using The Mcdn Access Codes (Tandem Calls) - Nortel BCM50 Configuration Manual

232 Chapter 24 Dialing plans

Tips about access codes

Here are some pointers to assist you in planning the access codes for your system.
Note: The following codes/digits must not conflict:
• park prefix
• external code
• direct dial digit
• private access code
• Public/Private Auto DN
• Public/Private DISA DN
• line pool code/destination code
• telephone DN
Note: When configuring a private network, ensure the numbering plan
does not conflict with the public telephone network. For example, in
North America, using "1" as an access code in a private network,
conflicts with the PSTN numbering plan for long-distance calls.
• External line access code: If the DN length is changed, and the changed DNs conflict with the
external line access code, the setting changes to None.
• Direct dial telephone: Another direct dial telephone, an extra dial telephone, can be assigned
for each schedule in Services programming.
If the DN length is changed, and the changed DNs conflict with the Direct dial digit, the
setting changes to None.
• Public/Private Auto DN: The length of the Auto DNs are the same as the Public or Private
Received Number Lengths specified under Configuration > Telephony > Dialing Plan. The
public/private Auto DN is cleared if the corresponding Received Number Length is changed.
• Public/Private DISA DN: The length of the DISA DNs are the same as the Public or Private
Received number length specified under Configuration > Telephony > Dialing Plan. The
public/private DISA DN is cleared if the corresponding Received number length is changed.

Using the MCDN access codes (tandem calls)

Three special codes exist specifically for programming over PRI and VoIP trunks that are using
the MCDN protocol, and which connect to a call server systems that use specific call codes for
special call types, such as the Meridian 1 (M1). The purpose of the codes is to allow easier
programming of the call server systems when calls are tandemed through a BCM to the local
PSTN.
NN40020-603 NN40020-603