This might help... it's from the Tech's handbook, note that COS Option 208 must be enabled in the CALLERS COS as well, whether it is a station or a trunk! Meaning if x100 calls x101 which is forwarded externally, x100 must have 208 enabled in it's COS. Same goes for trunks, if a DID caller calls x101 which is forwarded externally, the DID trunk's COS must have 208 enabled as well.
Programming Call Forwarding - External
Call Forwarding - External forwards calls to an external destination by using a personal speed call key, system abbreviated dial number, or a key system personal speedcall.
Call Forwarding - External requires a receiver for dialing. If one is not available in Call Forward - Don’t Answer, forwarding is ignored. If one is not available during a reroute, the caller is dropped or given reorder tone.
1. Program the following COS options in the extension’s COS:
- Enable COS Option 245 (Abbreviated Dialing Access).
- Enable COS Option 208 (Call Forwarding External).
* Note: The device which is calling the destination that is an external call forward must have COS Option 208, Call Forward External, enabled.
* Note: Check for split forwarding COS 260 and COS 709.
- Disable COS Option 200 (Account Code, Forced Entry - External Calls) to allow call forwarding to system abbreviated dial numbers.
2. Enable System Option 21 (Incoming to Outgoing Call Forward) for a trunk or party with a single party trunk on hold to forward externally.
3. Program a feature access code for Feature Access Code 03 (Call Forwarding - All Calls).
4. Form 30 (Device Interconnection Table) specifies which devices can be connected together. For external call forwarding that involves two trunks, verify that they can be connected together.
Toll Control applies to the calling party for Call Forwarding - External to personal speed call keys or to key system personal speedcalls.
Toll Control does not apply when forwarding to system abbreviated dial external numbers.
Toll Control does not apply to CO trunks which are externally call forwarded.
The forwarding destination is the current stored speedcall key number, personal abbreviated dial number, or system abbreviated dial number.
Note: On a Call Forward - Busy or Call Forward - Always call, the COS of the caller (trunk or extension) is checked. Keep this in mind when transferring calls to a phone which is externally Call Forwarded.