Call Hold, Call Transfer, Call Pickup, Group Pickup

[vlvinh]

which features (Call Hold, Call Transfer, Call Pickup, Group Pickup)is supported by Cisco CallManager version 4.1(3) when using analog phone is attached to VIC-2FXS inserted into NM-2V module of Router 2620XM. This router is running H.323 and was configured as a line gateway H.323 on CallManager 4.1(3).

[ebreniz]

When MGCP is used, the Cisco CallManager controls routing and tones and provides supplementary services to the gateway. MGCP provides call preservation (calls are maintained during failover and failback), redundancy, dial plan simplification (no dial peer configuration is required on the gateway), hookflash transfer, and tone on hold. MGCP-controlled gateways do not require an MTP to enable supplementary services such as hold, transfer, call pickup, and call park.

http://www.cisco.com/en/US/partner/products/sw/voicesw/ps556/products_administration_guide_chapter09186a00800c2efd.html