Please could somebody check how many ISDN channels/ ISDN circuits required for:
159 calls averaging 4 minutes. Which gives me 38160 CCS which is approx 11 Erlangs
The Erlang calculater works out that I need 19 lines.
Hence a single E1 or T1 with a minimum of 19 channels is required for the above inbound call volume.
Please could somebody confirm, that I have calculated this correctly?