OID value: 1.3.6.1.4.1.1466.115.121.1.52
OID description:
Telex Number:
actual-number "$" country "$" answerback
In the above, actual-number is the syntactic representation of the number portion of the TELEX number being encoded, country is the TELEX country code, and answerback is the answerback code of the TELEX terminal.
URL for further info: http://www.ietf.org/rfc/rfc2256.txt
See also the OID Repository website reference for 1.3.6.1.4.1.1466.115.121.1.52