User's Manual
Firmware Version 1.0.0.5 
UCM6510 IP PBX User Manual 
Page 146 of 192 
digits pattern (such as 0000, 1111, 1234, 2345, and etc), or common 
digits pattern (such as 111222, 321321 and etc) are not allowed to be 
configured as password. 
2.  Password for extension registration, web GUI admin login, LDAP and 
LDAP  sync    requires  alphanumeric  characters  containing  at  least 
two  categories  of  the  following,  with  a  minimum  length  of  4 
characters. 
  Numeric digits 
  Lowercase alphabet characters 
  Uppercase alphabet characters 
  Special characters 
Enable Random Password 
If enabled, random password will be generated when the extension is 
created. The default setting is "Yes". It is recommended to enable it for 
security purpose. 
Disable Extension Range 
If  set  to  "Yes",  users  could  disable  the  extension  range 
pre-configured/configured on the UCM6510. The default setting is "No". 
The default extension range assignment is: 
  User Extensions: 1000-6299 
  Pick Extensions: 4000-4999 
  Auto Provision Extensions: 5000-6299 
  Conference Extensions: 6300-6399 
  Ring Group Extensions: 6400-6499 
  Queue Extensions: 6500-6599 
  Voicemail Group Extensions: 6600-6699 
  IVR Extensions: 7000-7100 
  Fax Extensions: 7200-8200 
Note: 
It  is  recommended  to  keep  the  system  assignment  to  avoid 
inappropriate usage and unnecessary issues. 
INTERNAL OPTIONS/JITTER BUFFER 
Table 45: Internal Options/Jitter Buffer 
SIP Jitter Buffer 
Enable Jitter Buffer 
Select to enable jitter buffer on the sending side of the SIP channel. The 
default setting is "No". 










